2154936658 has 16 divisors (see below), whose sum is σ = 3780089280. Its totient is φ = 902066256.

The previous prime is 2154936629. The next prime is 2154936683. The reversal of 2154936658 is 8566394512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1789213 + ... + 1790416.

It is an arithmetic number, because the mean of its divisors is an integer number (236255580).

Almost surely, 2^2154936658 is an apocalyptic number.

2154936658 is a deficient number, since it is larger than the sum of its proper divisors (1625152622).

2154936658 is a wasteful number, since it uses less digits than its factorization.

2154936658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579681.

The product of its digits is 1555200, while the sum is 49.

The square root of 2154936658 is about 46421.2953072186. The cubic root of 2154936658 is about 1291.6499645226.

The spelling of 2154936658 in words is "two billion, one hundred fifty-four million, nine hundred thirty-six thousand, six hundred fifty-eight".