657155580697 has 48 divisors (see below), whose sum is σ = 835143644160. Its totient is φ = 506112583680.

The previous prime is 657155580671. The next prime is 657155580701. The reversal of 657155580697 is 796085551756.

It is not a de Polignac number, because 657155580697 - 2¹⁹ = 657155056409 is a prime.

It is a super-2 number, since 2×657155580697² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (657155580607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66461688 + ... + 66471574.

It is an arithmetic number, because the mean of its divisors is an integer number (17398825920).

Almost surely, 2^657155580697 is an apocalyptic number.

It is an amenable number.

657155580697 is a deficient number, since it is larger than the sum of its proper divisors (177988063463).

657155580697 is a wasteful number, since it uses less digits than its factorization.

657155580697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822 (or 10811 counting only the distinct ones).

The product of its (nonzero) digits is 79380000, while the sum is 64.

The spelling of 657155580697 in words is "six hundred fifty-seven billion, one hundred fifty-five million, five hundred eighty thousand, six hundred ninety-seven".