77984461632 has 112 divisors (see below), whose sum is σ = 257247493632. Its totient is φ = 20255700480.

The previous prime is 77984461619. The next prime is 77984461649. The reversal of 77984461632 is 23616448977.

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

It is a congruent number.

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, 2622678 + ... + 2652245.

Almost surely, 2^77984461632 is an apocalyptic number.

It is an amenable number.

77984461632 is an abundant number, since it is smaller than the sum of its proper divisors (179263032000).

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

77984461632 is a wasteful number, since it uses less digits than its factorization.

77984461632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274956 (or 5274946 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 57.

The spelling of 77984461632 in words is "seventy-seven billion, nine hundred eighty-four million, four hundred sixty-one thousand, six hundred thirty-two".