2156251254216 has 16 divisors (see below), whose sum is σ = 5390628135600. Its totient is φ = 718750418064.

The previous prime is 2156251254187. The next prime is 2156251254257. The reversal of 2156251254216 is 6124521526512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44921901106 + ... + 44921901153.

It is an arithmetic number, because the mean of its divisors is an integer number (336914258475).

Almost surely, 2^{2156251254216} is an apocalyptic number.

It is an amenable number.

2156251254216 is an abundant number, since it is smaller than the sum of its proper divisors (3234376881384).

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

2156251254216 is a wasteful number, since it uses less digits than its factorization.

2156251254216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89843802268 (or 89843802264 counting only the distinct ones).

The product of its digits is 288000, while the sum is 42.

The spelling of 2156251254216 in words is "two trillion, one hundred fifty-six billion, two hundred fifty-one million, two hundred fifty-four thousand, two hundred sixteen".