77670500520 has 128 divisors (see below), whose sum is σ = 247066588800. Its totient is φ = 19478716416.

The previous prime is 77670500503. The next prime is 77670500533. The reversal of 77670500520 is 2500507677.

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, 188032 + ... + 436688.

It is an arithmetic number, because the mean of its divisors is an integer number (1930207725).

Almost surely, 2^77670500520 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 77670500520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123533294400).

77670500520 is an abundant number, since it is smaller than the sum of its proper divisors (169396088280).

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

77670500520 is a wasteful number, since it uses less digits than its factorization.

77670500520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248827 (or 248823 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 39.

The spelling of 77670500520 in words is "seventy-seven billion, six hundred seventy million, five hundred thousand, five hundred twenty".