77480655831 has 48 divisors (see below), whose sum is σ = 117219438336. Its totient is φ = 49276418688.

The previous prime is 77480655817. The next prime is 77480655869. The reversal of 77480655831 is 13855608477.

It is a happy number.

77480655831 is a `hidden beast` number, since 7 + 7 + 4 + 80 + 6 + 558 + 3 + 1 = 666.

It is not a de Polignac number, because 77480655831 - 2¹⁵ = 77480623063 is a prime.

It is a super-2 number, since 2×77480655831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77480655881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2896540 + ... + 2923166.

It is an arithmetic number, because the mean of its divisors is an integer number (2442071632).

Almost surely, 2^77480655831 is an apocalyptic number.

77480655831 is a deficient number, since it is larger than the sum of its proper divisors (39738782505).

77480655831 is a wasteful number, since it uses less digits than its factorization.

77480655831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26852 (or 26849 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 77480655831 in words is "seventy-seven billion, four hundred eighty million, six hundred fifty-five thousand, eight hundred thirty-one".