64231534657 has 2 divisors, whose sum is σ = 64231534658. Its totient is φ = 64231534656.

The previous prime is 64231534567. The next prime is 64231534667. The reversal of 64231534657 is 75643513246.

It is a happy number.

Together with previous prime (64231534567) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64231326721 + 207936 = 253439^2 + 456^2 .

It is a cyclic number.

It is not a de Polignac number, because 64231534657 - 2¹¹ = 64231532609 is a prime.

It is not a weakly prime, because it can be changed into another prime (64231534667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32115767328 + 32115767329.

It is an arithmetic number, because the mean of its divisors is an integer number (32115767329).

Almost surely, 2^64231534657 is an apocalyptic number.

It is an amenable number.

64231534657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64231534657 is an equidigital number, since it uses as much as digits as its factorization.

64231534657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 46.

The spelling of 64231534657 in words is "sixty-four billion, two hundred thirty-one million, five hundred thirty-four thousand, six hundred fifty-seven".