2156116066570 has 16 divisors (see below), whose sum is σ = 3883498369920. Its totient is φ = 861893215504.

The previous prime is 2156116066567. The next prime is 2156116066571. The reversal of 2156116066570 is 756606116512.

It is a self number, because there is not a number n which added to its sum of digits gives 2156116066570.

It is not an unprimeable number, because it can be changed into a prime (2156116066571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69135022 + ... + 69166201.

It is an arithmetic number, because the mean of its divisors is an integer number (242718648120).

Almost surely, 2^{2156116066570} is an apocalyptic number.

2156116066570 is a deficient number, since it is larger than the sum of its proper divisors (1727382303350).

2156116066570 is a wasteful number, since it uses less digits than its factorization.

2156116066570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138302789.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 2156116066570 in words is "two trillion, one hundred fifty-six billion, one hundred sixteen million, sixty-six thousand, five hundred seventy".