2156156144870 has 96 divisors (see below), whose sum is σ = 4867387223328. Its totient is φ = 681633695232.

The previous prime is 2156156144861. The next prime is 2156156144927. The reversal of 2156156144870 is 784416516512.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5590994 + ... + 5964186.

It is an arithmetic number, because the mean of its divisors is an integer number (50701950243).

Almost surely, 2^{2156156144870} is an apocalyptic number.

2156156144870 is an abundant number, since it is smaller than the sum of its proper divisors (2711231078458).

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

2156156144870 is a wasteful number, since it uses less digits than its factorization.

2156156144870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374134 (or 374127 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 2156156144870 in words is "two trillion, one hundred fifty-six billion, one hundred fifty-six million, one hundred forty-four thousand, eight hundred seventy".