120988491556 has 9 divisors (see below), whose sum is σ = 211731077649. Its totient is φ = 60493897944.

The previous prime is 120988491499. The next prime is 120988491571. The reversal of 120988491556 is 655194889021.

The square root of 120988491556 is 347834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 51406492900 + 69581998656 = 226730^2 + 263784^2 .

It is a super-2 number, since 2×120988491556² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120988491556.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 608710 + ... + 782626.

Almost surely, 2^120988491556 is an apocalyptic number.

120988491556 is the 347834-th square number.

It is an amenable number.

120988491556 is a deficient number, since it is larger than the sum of its proper divisors (90742586093).

120988491556 is an frugal number, since it uses more digits than its factorization.

120988491556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347838 (or 173919 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 58.

The spelling of 120988491556 in words is "one hundred twenty billion, nine hundred eighty-eight million, four hundred ninety-one thousand, five hundred fifty-six".