817232653957 has 2 divisors, whose sum is σ = 817232653958. Its totient is φ = 817232653956.

The previous prime is 817232653907. The next prime is 817232653973. The reversal of 817232653957 is 759356232718.

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., 606956297476 + 210276356481 = 779074^2 + 458559^2 .

It is a cyclic number.

It is not a de Polignac number, because 817232653957 - 2⁷ = 817232653829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817232653907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408616326978 + 408616326979.

It is an arithmetic number, because the mean of its divisors is an integer number (408616326979).

Almost surely, 2^817232653957 is an apocalyptic number.

It is an amenable number.

817232653957 is a deficient number, since it is larger than the sum of its proper divisors (1).

817232653957 is an equidigital number, since it uses as much as digits as its factorization.

817232653957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19051200, while the sum is 58.

The spelling of 817232653957 in words is "eight hundred seventeen billion, two hundred thirty-two million, six hundred fifty-three thousand, nine hundred fifty-seven".