77091632172 has 24 divisors (see below), whose sum is σ = 199867194800. Its totient is φ = 25697210688.

The previous prime is 77091632161. The next prime is 77091632179. The reversal of 77091632172 is 27123619077.

77091632172 is a `hidden beast` number, since 7 + 7 + 0 + 9 + 1 + 632 + 1 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (77091632179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356905597 + ... + 356905812.

Almost surely, 2^77091632172 is an apocalyptic number.

It is an amenable number.

77091632172 is an abundant number, since it is smaller than the sum of its proper divisors (122775562628).

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

77091632172 is a wasteful number, since it uses less digits than its factorization.

77091632172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713811422 (or 713811414 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 77091632172 in words is "seventy-seven billion, ninety-one million, six hundred thirty-two thousand, one hundred seventy-two".