120987164558 has 36 divisors (see below), whose sum is σ = 197040808224. Its totient is φ = 55691064000.

The previous prime is 120987164549. The next prime is 120987164609. The reversal of 120987164558 is 855461789021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 122085443 + ... + 122086433.

It is an arithmetic number, because the mean of its divisors is an integer number (5473355784).

Almost surely, 2^120987164558 is an apocalyptic number.

120987164558 is a deficient number, since it is larger than the sum of its proper divisors (76053643666).

120987164558 is an frugal number, since it uses more digits than its factorization.

120987164558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 120987164558 in words is "one hundred twenty billion, nine hundred eighty-seven million, one hundred sixty-four thousand, five hundred fifty-eight".