77725264631 has 64 divisors (see below), whose sum is σ = 97054433280. Its totient is φ = 60817236480.

The previous prime is 77725264621. The next prime is 77725264663. The reversal of 77725264631 is 13646252777.

It is not a de Polignac number, because 77725264631 - 2¹⁴ = 77725248247 is a prime.

It is a super-2 number, since 2×77725264631² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77725264631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77725264621) 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 63 ways as a sum of consecutive naturals, for example, 132410720 + ... + 132411306.

It is an arithmetic number, because the mean of its divisors is an integer number (1516475520).

Almost surely, 2^77725264631 is an apocalyptic number.

77725264631 is a deficient number, since it is larger than the sum of its proper divisors (19329168649).

77725264631 is a wasteful number, since it uses less digits than its factorization.

77725264631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 2963520, while the sum is 50.

The spelling of 77725264631 in words is "seventy-seven billion, seven hundred twenty-five million, two hundred sixty-four thousand, six hundred thirty-one".