2277391656921 has 16 divisors (see below), whose sum is σ = 3215812867200. Its totient is φ = 1428653092608.

The previous prime is 2277391656919. The next prime is 2277391656929. The reversal of 2277391656921 is 1296561937722.

It is not a de Polignac number, because 2277391656921 - 2¹ = 2277391656919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2277391656929) 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, 4417981 + ... + 4906458.

It is an arithmetic number, because the mean of its divisors is an integer number (200988304200).

Almost surely, 2^{2277391656921} is an apocalyptic number.

It is an amenable number.

2277391656921 is a deficient number, since it is larger than the sum of its proper divisors (938421210279).

2277391656921 is a wasteful number, since it uses less digits than its factorization.

2277391656921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9329248.

The product of its digits is 17146080, while the sum is 60.

The spelling of 2277391656921 in words is "two trillion, two hundred seventy-seven billion, three hundred ninety-one million, six hundred fifty-six thousand, nine hundred twenty-one".