656007021623 has 2 divisors, whose sum is σ = 656007021624. Its totient is φ = 656007021622.

The previous prime is 656007021617. The next prime is 656007021643. The reversal of 656007021623 is 326120700656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656007021623 - 2⁸ = 656007021367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656007021643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328003510811 + 328003510812.

It is an arithmetic number, because the mean of its divisors is an integer number (328003510812).

Almost surely, 2^656007021623 is an apocalyptic number.

656007021623 is a deficient number, since it is larger than the sum of its proper divisors (1).

656007021623 is an equidigital number, since it uses as much as digits as its factorization.

656007021623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 656007021623 in words is "six hundred fifty-six billion, seven million, twenty-one thousand, six hundred twenty-three".