5623451657 has 2 divisors, whose sum is σ = 5623451658. Its totient is φ = 5623451656.

The previous prime is 5623451653. The next prime is 5623451663. The reversal of 5623451657 is 7561543265.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2937206416 + 2686245241 = 54196^2 + 51829^2 .

It is a cyclic number.

It is not a de Polignac number, because 5623451657 - 2² = 5623451653 is a prime.

It is not a weakly prime, because it can be changed into another prime (5623451653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2811725828 + 2811725829.

It is an arithmetic number, because the mean of its divisors is an integer number (2811725829).

Almost surely, 2^5623451657 is an apocalyptic number.

It is an amenable number.

5623451657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5623451657 is an equidigital number, since it uses as much as digits as its factorization.

5623451657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 44.

The square root of 5623451657 is about 74989.6770029049. The cubic root of 5623451657 is about 1778.2834582823.

The spelling of 5623451657 in words is "five billion, six hundred twenty-three million, four hundred fifty-one thousand, six hundred fifty-seven".