2156040654 has 16 divisors (see below), whose sum is σ = 4499563392. Its totient is φ = 687433208.

The previous prime is 2156040647. The next prime is 2156040659. The reversal of 2156040654 is 4560406512.

It is a super-2 number, since 2×2156040654² = 9297022603401495432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156040659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7811604 + ... + 7811879.

It is an arithmetic number, because the mean of its divisors is an integer number (281222712).

Almost surely, 2^2156040654 is an apocalyptic number.

2156040654 is an abundant number, since it is smaller than the sum of its proper divisors (2343522738).

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

2156040654 is a wasteful number, since it uses less digits than its factorization.

2156040654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15623511.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 2156040654 is about 46433.1848358477. The cubic root of 2156040654 is about 1291.8705020102.

The spelling of 2156040654 in words is "two billion, one hundred fifty-six million, forty thousand, six hundred fifty-four".