653623857 has 16 divisors (see below), whose sum is σ = 968980480. Its totient is φ = 435457296.

The previous prime is 653623811. The next prime is 653623891. The reversal of 653623857 is 758326356.

It is not a de Polignac number, because 653623857 - 2¹⁴ = 653607473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653623057) 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, 37623 + ... + 52179.

It is an arithmetic number, because the mean of its divisors is an integer number (60561280).

Almost surely, 2^653623857 is an apocalyptic number.

It is an amenable number.

653623857 is a deficient number, since it is larger than the sum of its proper divisors (315356623).

653623857 is a wasteful number, since it uses less digits than its factorization.

653623857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16229 (or 16223 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 653623857 is about 25566.0684697511. The cubic root of 653623857 is about 867.8459314597.

The spelling of 653623857 in words is "six hundred fifty-three million, six hundred twenty-three thousand, eight hundred fifty-seven".