2156102132556 has 48 divisors (see below), whose sum is σ = 5050371362400. Its totient is φ = 715925786176.

The previous prime is 2156102132497. The next prime is 2156102132557. The reversal of 2156102132556 is 6552312016512.

It is a super-4 number, since 4×2156102132556⁴ (a number of 50 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (2156102132557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2789264986 + ... + 2789265758.

It is an arithmetic number, because the mean of its divisors is an integer number (105216070050).

Almost surely, 2^{2156102132556} is an apocalyptic number.

It is an amenable number.

2156102132556 is an abundant number, since it is smaller than the sum of its proper divisors (2894269229844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156102132556 is an frugal number, since it uses more digits than its factorization.

2156102132556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 2156102132556 in words is "two trillion, one hundred fifty-six billion, one hundred two million, one hundred thirty-two thousand, five hundred fifty-six".