97657115557 has 8 divisors (see below), whose sum is σ = 98377629336. Its totient is φ = 96936713472.

The previous prime is 97657115551. The next prime is 97657115579. The reversal of 97657115557 is 75551175679.

It can be written as a sum of positive squares in 4 ways, for example, as 1764084001 + 95893031556 = 42001^2 + 309666^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97657115557 - 2¹⁹ = 97656591269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97657115551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2710183 + ... + 2745979.

It is an arithmetic number, because the mean of its divisors is an integer number (12297203667).

Almost surely, 2^97657115557 is an apocalyptic number.

It is an amenable number.

97657115557 is a deficient number, since it is larger than the sum of its proper divisors (720513779).

97657115557 is a wasteful number, since it uses less digits than its factorization.

97657115557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55847.

The product of its digits is 11576250, while the sum is 58.

The spelling of 97657115557 in words is "ninety-seven billion, six hundred fifty-seven million, one hundred fifteen thousand, five hundred fifty-seven".