97657115551 has 2 divisors, whose sum is σ = 97657115552. Its totient is φ = 97657115550.

The previous prime is 97657115509. The next prime is 97657115579. The reversal of 97657115551 is 15551175679.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97657115551 - 2¹⁷ = 97656984479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97657415551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48828557775 + 48828557776.

It is an arithmetic number, because the mean of its divisors is an integer number (48828557776).

Almost surely, 2^97657115551 is an apocalyptic number.

97657115551 is a deficient number, since it is larger than the sum of its proper divisors (1).

97657115551 is an equidigital number, since it uses as much as digits as its factorization.

97657115551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653750, while the sum is 52.

The spelling of 97657115551 in words is "ninety-seven billion, six hundred fifty-seven million, one hundred fifteen thousand, five hundred fifty-one".