657587611313 has 4 divisors (see below), whose sum is σ = 669994924788. Its totient is φ = 645180297840.

The previous prime is 657587611309. The next prime is 657587611367. The reversal of 657587611313 is 313116785756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 398605347904 + 258982263409 = 631352^2 + 508903^2 .

It is a cyclic number.

It is not a de Polignac number, because 657587611313 - 2² = 657587611309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 12407313421 = 657587611313 / (6 + 5 + 7 + 5 + 8 + 7 + 6 + 1 + 1 + 3 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657587631313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6203656658 + ... + 6203656763.

It is an arithmetic number, because the mean of its divisors is an integer number (167498731197).

Almost surely, 2^657587611313 is an apocalyptic number.

It is an amenable number.

657587611313 is a deficient number, since it is larger than the sum of its proper divisors (12407313475).

657587611313 is a wasteful number, since it uses less digits than its factorization.

657587611313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12407313474.

The product of its digits is 3175200, while the sum is 53.

The spelling of 657587611313 in words is "six hundred fifty-seven billion, five hundred eighty-seven million, six hundred eleven thousand, three hundred thirteen".