655561051613 has 12 divisors (see below), whose sum is σ = 711603577620. Its totient is φ = 603653671296.

The previous prime is 655561051577. The next prime is 655561051631. The reversal of 655561051613 is 316150165556.

It can be written as a sum of positive squares in 6 ways, for example, as 101008281124 + 554552770489 = 317818^2 + 744683^2 .

It is not a de Polignac number, because 655561051613 - 2¹⁸ = 655560789469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655561051633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4673006 + ... + 4811247.

It is an arithmetic number, because the mean of its divisors is an integer number (59300298135).

Almost surely, 2^655561051613 is an apocalyptic number.

It is an amenable number.

655561051613 is a deficient number, since it is larger than the sum of its proper divisors (56042526007).

655561051613 is a wasteful number, since it uses less digits than its factorization.

655561051613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484688 (or 9484675 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 44.

The spelling of 655561051613 in words is "six hundred fifty-five billion, five hundred sixty-one million, fifty-one thousand, six hundred thirteen".