20152611375556 has 81 divisors (see below), whose sum is σ = 38937321477327. Its totient is φ = 9119650945680.

The previous prime is 20152611375497. The next prime is 20152611375607. The reversal of 20152611375556 is 65557311625102.

The square root of 20152611375556 is 4489166.

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

It is a super-2 number, since 2×20152611375556² (a number of 27 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 26 ways as a sum of consecutive naturals, for example, 41381131945 + ... + 41381132431.

Almost surely, 2^{20152611375556} is an apocalyptic number.

20152611375556 is the 4489166-th square number.

It is an amenable number.

20152611375556 is a deficient number, since it is larger than the sum of its proper divisors (18784710101771).

20152611375556 is an frugal number, since it uses more digits than its factorization.

20152611375556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 49.

Multiplying 20152611375556 by its sum of digits (49), we get a square (987477957402244 = 31424162²).

The spelling of 20152611375556 in words is "twenty trillion, one hundred fifty-two billion, six hundred eleven million, three hundred seventy-five thousand, five hundred fifty-six".