120779998515 has 384 divisors, whose sum is σ = 259836595200. Its totient is φ = 51207045120.

The previous prime is 120779998511. The next prime is 120779998517. The reversal of 120779998515 is 515899977021.

120779998515 is a `hidden beast` number, since 1 + 20 + 7 + 7 + 9 + 9 + 98 + 515 = 666.

It is not a de Polignac number, because 120779998515 - 2² = 120779998511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120779998511) 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 383 ways as a sum of consecutive naturals, for example, 1357078591 + ... + 1357078679.

It is an arithmetic number, because the mean of its divisors is an integer number (676657800).

Almost surely, 2^120779998515 is an apocalyptic number.

120779998515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120779998515 is an abundant number, since it is smaller than the sum of its proper divisors (139056596685).

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

120779998515 is a wasteful number, since it uses less digits than its factorization.

120779998515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 63.

The spelling of 120779998515 in words is "one hundred twenty billion, seven hundred seventy-nine million, nine hundred ninety-eight thousand, five hundred fifteen".