77786585128704 has 36 divisors (see below), whose sum is σ = 207025755214376. Its totient is φ = 25928861709312.

The previous prime is 77786585128691. The next prime is 77786585128757. The reversal of 77786585128704 is 40782158568777.

It is a super-2 number, since 2×77786585128704² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50642307259 + ... + 50642308794.

Almost surely, 2^{77786585128704} is an apocalyptic number.

It is an amenable number.

77786585128704 is an abundant number, since it is smaller than the sum of its proper divisors (129239170085672).

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

77786585128704 is a wasteful number, since it uses less digits than its factorization.

77786585128704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101284616072 (or 101284616058 counting only the distinct ones).

The product of its (nonzero) digits is 1475174400, while the sum is 75.

The spelling of 77786585128704 in words is "seventy-seven trillion, seven hundred eighty-six billion, five hundred eighty-five million, one hundred twenty-eight thousand, seven hundred four".