77115618552 has 128 divisors (see below), whose sum is σ = 233457292800. Its totient is φ = 20722188288.

The previous prime is 77115618533. The next prime is 77115618577. The reversal of 77115618552 is 25581651177.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4340824 + ... + 4358552.

It is an arithmetic number, because the mean of its divisors is an integer number (1823885100).

Almost surely, 2^77115618552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77115618552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116728646400).

77115618552 is an abundant number, since it is smaller than the sum of its proper divisors (156341674248).

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

77115618552 is a wasteful number, since it uses less digits than its factorization.

77115618552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285 (or 19281 counting only the distinct ones).

The product of its digits is 588000, while the sum is 48.

The spelling of 77115618552 in words is "seventy-seven billion, one hundred fifteen million, six hundred eighteen thousand, five hundred fifty-two".