77516112121980 has 96 divisors (see below), whose sum is σ = 248070687997440. Its totient is φ = 17716602113280.

The previous prime is 77516112121969. The next prime is 77516112122021. The reversal of 77516112121980 is 8912121161577.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1658851 + ... + 12561210.

It is an arithmetic number, because the mean of its divisors is an integer number (2584069666640).

Almost surely, 2^{77516112121980} is an apocalyptic number.

77516112121980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77516112121980 is an abundant number, since it is smaller than the sum of its proper divisors (170554575875460).

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

77516112121980 is a wasteful number, since it uses less digits than its factorization.

77516112121980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14233059 (or 14233057 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 51.

The spelling of 77516112121980 in words is "seventy-seven trillion, five hundred sixteen billion, one hundred twelve million, one hundred twenty-one thousand, nine hundred eighty".