76544394731 has 16 divisors (see below), whose sum is σ = 89582054400. Its totient is φ = 64051086528.

The previous prime is 76544394691. The next prime is 76544394827. The reversal of 76544394731 is 13749344567.

It is a cyclic number.

It is not a de Polignac number, because 76544394731 - 2¹⁰ = 76544393707 is a prime.

It is a super-2 number, since 2×76544394731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76544394931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728405 + ... + 826838.

It is an arithmetic number, because the mean of its divisors is an integer number (5598878400).

Almost surely, 2^76544394731 is an apocalyptic number.

76544394731 is a deficient number, since it is larger than the sum of its proper divisors (13037659669).

76544394731 is a wasteful number, since it uses less digits than its factorization.

76544394731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555418.

The product of its digits is 7620480, while the sum is 53.

The spelling of 76544394731 in words is "seventy-six billion, five hundred forty-four million, three hundred ninety-four thousand, seven hundred thirty-one".