657456272197 has 2 divisors, whose sum is σ = 657456272198. Its totient is φ = 657456272196.

The previous prime is 657456272063. The next prime is 657456272203. The reversal of 657456272197 is 791272654756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583949675556 + 73506596641 = 764166^2 + 271121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657456272197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (657456272597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328728136098 + 328728136099.

It is an arithmetic number, because the mean of its divisors is an integer number (328728136099).

Almost surely, 2^657456272197 is an apocalyptic number.

It is an amenable number.

657456272197 is a deficient number, since it is larger than the sum of its proper divisors (1).

657456272197 is an equidigital number, since it uses as much as digits as its factorization.

657456272197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44452800, while the sum is 61.

The spelling of 657456272197 in words is "six hundred fifty-seven billion, four hundred fifty-six million, two hundred seventy-two thousand, one hundred ninety-seven".