120663137956 has 9 divisors (see below), whose sum is σ = 211161707211. Its totient is φ = 60331221612.

The previous prime is 120663137939. The next prime is 120663137963. The reversal of 120663137956 is 659731366021.

The square root of 120663137956 is 347366.

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

It is a super-2 number, since 2×120663137956² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 607891 + ... + 781573.

Almost surely, 2^120663137956 is an apocalyptic number.

120663137956 is the 347366-th square number.

It is an amenable number.

120663137956 is a deficient number, since it is larger than the sum of its proper divisors (90498569255).

120663137956 is an frugal number, since it uses more digits than its factorization.

120663137956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347370 (or 173685 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 49.

Multiplying 120663137956 by its sum of digits (49), we get a square (5912493759844 = 2431562²).

The spelling of 120663137956 in words is "one hundred twenty billion, six hundred sixty-three million, one hundred thirty-seven thousand, nine hundred fifty-six".