656201623057 has 2 divisors, whose sum is σ = 656201623058. Its totient is φ = 656201623056.

The previous prime is 656201623039. The next prime is 656201623079. The reversal of 656201623057 is 750326102656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656179382401 + 22240656 = 810049^2 + 4716^2 .

It is a cyclic number.

It is not a de Polignac number, because 656201623057 - 2¹⁹ = 656201098769 is a prime.

It is a super-2 number, since 2×656201623057² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (656201623087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328100811528 + 328100811529.

It is an arithmetic number, because the mean of its divisors is an integer number (328100811529).

Almost surely, 2^656201623057 is an apocalyptic number.

It is an amenable number.

656201623057 is a deficient number, since it is larger than the sum of its proper divisors (1).

656201623057 is an equidigital number, since it uses as much as digits as its factorization.

656201623057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 656201623057 in words is "six hundred fifty-six billion, two hundred one million, six hundred twenty-three thousand, fifty-seven".