78538520832 has 144 divisors (see below), whose sum is σ = 216227074560. Its totient is φ = 25281331200.

The previous prime is 78538520803. The next prime is 78538520849. The reversal of 78538520832 is 23802583587.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12115032 + ... + 12121512.

Almost surely, 2^78538520832 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 78538520832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108113537280).

78538520832 is an abundant number, since it is smaller than the sum of its proper divisors (137688553728).

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

78538520832 is a wasteful number, since it uses less digits than its factorization.

78538520832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040 (or 7026 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 78538520832 in words is "seventy-eight billion, five hundred thirty-eight million, five hundred twenty thousand, eight hundred thirty-two".