77320023132 has 48 divisors (see below), whose sum is σ = 199752158592. Its totient is φ = 23080601280.

The previous prime is 77320023107. The next prime is 77320023167. The reversal of 77320023132 is 23132002377.

It is a self number, because there is not a number n which added to its sum of digits gives 77320023132.

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, 4362483 + ... + 4380170.

It is an arithmetic number, because the mean of its divisors is an integer number (4161503304).

Almost surely, 2^77320023132 is an apocalyptic number.

It is an amenable number.

77320023132 is an abundant number, since it is smaller than the sum of its proper divisors (122432135460).

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

77320023132 is a wasteful number, since it uses less digits than its factorization.

77320023132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742738 (or 8742736 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 30.

The spelling of 77320023132 in words is "seventy-seven billion, three hundred twenty million, twenty-three thousand, one hundred thirty-two".