2156539537 has 8 divisors (see below), whose sum is σ = 2161689120. Its totient is φ = 2151397920.

The previous prime is 2156539529. The next prime is 2156539559. The reversal of 2156539537 is 7359356512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156539537 - 2³ = 2156539529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156539037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250758 + ... + 1252480.

It is an arithmetic number, because the mean of its divisors is an integer number (270211140).

Almost surely, 2^2156539537 is an apocalyptic number.

It is an amenable number.

2156539537 is a deficient number, since it is larger than the sum of its proper divisors (5149583).

2156539537 is a wasteful number, since it uses less digits than its factorization.

2156539537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983.

The product of its digits is 850500, while the sum is 46.

The square root of 2156539537 is about 46438.5565774820. The cubic root of 2156539537 is about 1291.9701356492.

The spelling of 2156539537 in words is "two billion, one hundred fifty-six million, five hundred thirty-nine thousand, five hundred thirty-seven".