77518642680 has 96 divisors (see below), whose sum is σ = 261266569200. Its totient is φ = 20671635456.

The previous prime is 77518642673. The next prime is 77518642777. The reversal of 77518642680 is 8624681577.

77518642680 is a `hidden beast` number, since 7 + 7 + 518 + 6 + 42 + 6 + 80 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3977865 + ... + 3997304.

Almost surely, 2^77518642680 is an apocalyptic number.

It is an amenable number.

77518642680 is an abundant number, since it is smaller than the sum of its proper divisors (183747926520).

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

77518642680 is a wasteful number, since it uses less digits than its factorization.

77518642680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975195 (or 7975179 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 77518642680 in words is "seventy-seven billion, five hundred eighteen million, six hundred forty-two thousand, six hundred eighty".