751545084889 has 3 divisors (see below), whose sum is σ = 751545951807. Its totient is φ = 751544217972.

The previous prime is 751545084887. The next prime is 751545084923. The reversal of 751545084889 is 988480545157.

The square root of 751545084889 is 866917.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 436702897225 + 314842187664 = 660835^2 + 561108^2 .

It is not a de Polignac number, because 751545084889 - 2¹ = 751545084887 is a prime.

It is a super-2 number, since 2×751545084889² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 751545084889.

It is not an unprimeable number, because it can be changed into a prime (751545084887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 433459 + ... + 1300375.

It is an arithmetic number, because the mean of its divisors is an integer number (250515317269).

Almost surely, 2^751545084889 is an apocalyptic number.

751545084889 is the 866917-th square number.

751545084889 is the 433459-th centered octagonal number.

It is an amenable number.

751545084889 is a deficient number, since it is larger than the sum of its proper divisors (866918).

751545084889 is an frugal number, since it uses more digits than its factorization.

751545084889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733834 (or 866917 counting only the distinct ones).

The product of its (nonzero) digits is 64512000, while the sum is 64.

Multiplying 751545084889 by its sum of digits (64), we get a square (48098885432896 = 6935336²).

The spelling of 751545084889 in words is "seven hundred fifty-one billion, five hundred forty-five million, eighty-four thousand, eight hundred eighty-nine".