77540787456 has 72 divisors (see below), whose sum is σ = 225132651744. Its totient is φ = 23497205760.

The previous prime is 77540787431. The next prime is 77540787473. The reversal of 77540787456 is 65478704577.

It is a self number, because there is not a number n which added to its sum of digits gives 77540787456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4580851 + ... + 4597746.

Almost surely, 2^77540787456 is an apocalyptic number.

It is an amenable number.

77540787456 is an abundant number, since it is smaller than the sum of its proper divisors (147591864288).

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

77540787456 is a wasteful number, since it uses less digits than its factorization.

77540787456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9178627 (or 9178613 counting only the distinct ones).

The product of its (nonzero) digits is 46099200, while the sum is 60.

The spelling of 77540787456 in words is "seventy-seven billion, five hundred forty million, seven hundred eighty-seven thousand, four hundred fifty-six".