2156151571456 has 33 divisors (see below), whose sum is σ = 4310291458879. Its totient is φ = 1078052291584.

The previous prime is 2156151571429. The next prime is 2156151571463. The reversal of 2156151571456 is 6541751516512.

The square root of 2156151571456 is 1468384.

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

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46965345 + ... + 47011231.

Almost surely, 2^{2156151571456} is an apocalyptic number.

2156151571456 is the 1468384-th square number.

It is an amenable number.

2156151571456 is a deficient number, since it is larger than the sum of its proper divisors (2154139887423).

2156151571456 is an frugal number, since it uses more digits than its factorization.

2156151571456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91794 (or 45889 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 49.

Multiplying 2156151571456 by its sum of digits (49), we get a square (105651427001344 = 10278688²).

The spelling of 2156151571456 in words is "two trillion, one hundred fifty-six billion, one hundred fifty-one million, five hundred seventy-one thousand, four hundred fifty-six".