749127725281 has 8 divisors (see below), whose sum is σ = 806846118120. Its totient is φ = 691422644352.

The previous prime is 749127725279. The next prime is 749127725303. The reversal of 749127725281 is 182527721947.

It can be written as a sum of positive squares in 4 ways, for example, as 3253675681 + 745874049600 = 57041^2 + 863640^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749127725281 - 2¹ = 749127725279 is a prime.

It is a super-2 number, since 2×749127725281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749127725231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3210940 + ... + 3436333.

It is an arithmetic number, because the mean of its divisors is an integer number (100855764765).

Almost surely, 2^749127725281 is an apocalyptic number.

It is an amenable number.

749127725281 is a deficient number, since it is larger than the sum of its proper divisors (57718392839).

749127725281 is a wasteful number, since it uses less digits than its factorization.

749127725281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6655955.

The product of its digits is 3951360, while the sum is 55.

The spelling of 749127725281 in words is "seven hundred forty-nine billion, one hundred twenty-seven million, seven hundred twenty-five thousand, two hundred eighty-one".