77732640832 has 112 divisors (see below), whose sum is σ = 192409803648. Its totient is φ = 30270136320.

The previous prime is 77732640827. The next prime is 77732640857. The reversal of 77732640832 is 23804623777.

It is a tau number, because it is divible by the number of its divisors (112).

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, 17920968 + ... + 17925304.

Almost surely, 2^77732640832 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 77732640832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96204901824).

77732640832 is an abundant number, since it is smaller than the sum of its proper divisors (114677162816).

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

77732640832 is a wasteful number, since it uses less digits than its factorization.

77732640832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004 (or 7994 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 77732640832 in words is "seventy-seven billion, seven hundred thirty-two million, six hundred forty thousand, eight hundred thirty-two".