77521565116 has 12 divisors (see below), whose sum is σ = 136096168432. Its totient is φ = 38636945568.

The previous prime is 77521565101. The next prime is 77521565117. The reversal of 77521565116 is 61156512577.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77521565117) 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 3 ways as a sum of consecutive naturals, for example, 30957840 + ... + 30960343.

Almost surely, 2^77521565116 is an apocalyptic number.

It is an amenable number.

77521565116 is a deficient number, since it is larger than the sum of its proper divisors (58574603316).

77521565116 is a wasteful number, since it uses less digits than its factorization.

77521565116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61918500 (or 61918498 counting only the distinct ones).

The product of its digits is 441000, while the sum is 46.

The spelling of 77521565116 in words is "seventy-seven billion, five hundred twenty-one million, five hundred sixty-five thousand, one hundred sixteen".