745255811524 has 135 divisors (see below), whose sum is σ = 1594664151983. Its totient is φ = 304710920976.

The previous prime is 745255811513. The next prime is 745255811527. The reversal of 745255811524 is 425118552547.

The square root of 745255811524 is 863282.

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

It is a super-2 number, since 2×745255811524² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (745255811527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1945837437 + ... + 1945837819.

Almost surely, 2^745255811524 is an apocalyptic number.

745255811524 is the 863282-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745255811524

745255811524 is an abundant number, since it is smaller than the sum of its proper divisors (849408340459).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745255811524 is an frugal number, since it uses more digits than its factorization.

745255811524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 415 counting only the distinct ones).

The product of its digits is 2240000, while the sum is 49.

Multiplying 745255811524 by its sum of digits (49), we get a square (36517534764676 = 6042974²).

745255811524 divided by its sum of digits (49) gives a square (15209302276 = 123326²).

The spelling of 745255811524 in words is "seven hundred forty-five billion, two hundred fifty-five million, eight hundred eleven thousand, five hundred twenty-four".