2106927657 has 24 divisors (see below), whose sum is σ = 3232794240. Its totient is φ = 1317713280.

The previous prime is 2106927653. The next prime is 2106927659. The reversal of 2106927657 is 7567296012.

It is not a de Polignac number, because 2106927657 - 2² = 2106927653 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2106927653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25444 + ... + 69722.

It is an arithmetic number, because the mean of its divisors is an integer number (134699760).

Almost surely, 2^2106927657 is an apocalyptic number.

It is an amenable number.

2106927657 is a deficient number, since it is larger than the sum of its proper divisors (1125866583).

2106927657 is a wasteful number, since it uses less digits than its factorization.

2106927657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44613 (or 44610 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 2106927657 is about 45901.2816487732. The cubic root of 2106927657 is about 1281.9857801939.

The spelling of 2106927657 in words is "two billion, one hundred six million, nine hundred twenty-seven thousand, six hundred fifty-seven".