23647628857 has 2 divisors, whose sum is σ = 23647628858. Its totient is φ = 23647628856.

The previous prime is 23647628801. The next prime is 23647628861. The reversal of 23647628857 is 75882674632.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14672719161 + 8974909696 = 121131^2 + 94736^2 .

It is a cyclic number.

It is not a de Polignac number, because 23647628857 - 2¹¹ = 23647626809 is a prime.

It is not a weakly prime, because it can be changed into another prime (23647628887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11823814428 + 11823814429.

It is an arithmetic number, because the mean of its divisors is an integer number (11823814429).

Almost surely, 2^23647628857 is an apocalyptic number.

It is an amenable number.

23647628857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23647628857 is an equidigital number, since it uses as much as digits as its factorization.

23647628857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 58.

The spelling of 23647628857 in words is "twenty-three billion, six hundred forty-seven million, six hundred twenty-eight thousand, eight hundred fifty-seven".