2156261125501 has 32 divisors (see below), whose sum is σ = 2540440345856. Its totient is φ = 1792010304000.

The previous prime is 2156261125457. The next prime is 2156261125541. The reversal of 2156261125501 is 1055211626512.

It is not a de Polignac number, because 2156261125501 - 2¹¹ = 2156261123453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156261125541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57990646 + ... + 58027816.

It is an arithmetic number, because the mean of its divisors is an integer number (79388760808).

Almost surely, 2^{2156261125501} is an apocalyptic number.

It is an amenable number.

2156261125501 is a deficient number, since it is larger than the sum of its proper divisors (384179220355).

2156261125501 is a wasteful number, since it uses less digits than its factorization.

2156261125501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39173.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 2156261125501 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-one million, one hundred twenty-five thousand, five hundred one".