77232091904 has 54 divisors (see below), whose sum is σ = 168209387724. Its totient is φ = 35098792960.

The previous prime is 77232091903. The next prime is 77232091931. The reversal of 77232091904 is 40919023277.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (77232091903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14744774 + ... + 14750010.

Almost surely, 2^77232091904 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 77232091904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84104693862).

77232091904 is an abundant number, since it is smaller than the sum of its proper divisors (90977295820).

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

77232091904 is an frugal number, since it uses more digits than its factorization.

77232091904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501 (or 5250 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

Multiplying 77232091904 by its sum of digits (44), we get a square (3398212043776 = 1843424²).

77232091904 divided by its sum of digits (44) gives a square (1755274816 = 41896²).

The spelling of 77232091904 in words is "seventy-seven billion, two hundred thirty-two million, ninety-one thousand, nine hundred four".