655551515436511 has 16 divisors (see below), whose sum is σ = 661429416001536. Its totient is φ = 649684842006816.

The previous prime is 655551515436479. The next prime is 655551515436533. The reversal of 655551515436511 is 115634515155556.

It is a cyclic number.

It is not a de Polignac number, because 655551515436511 - 2⁵ = 655551515436479 is a prime.

It is a super-2 number, since 2×655551515436511² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655551915436511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7066599250 + ... + 7066692016.

It is an arithmetic number, because the mean of its divisors is an integer number (41339338500096).

Almost surely, 2^{655551515436511} is an apocalyptic number.

655551515436511 is a deficient number, since it is larger than the sum of its proper divisors (5877900565025).

655551515436511 is a wasteful number, since it uses less digits than its factorization.

655551515436511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152598.

The product of its digits is 33750000, while the sum is 58.

The spelling of 655551515436511 in words is "six hundred fifty-five trillion, five hundred fifty-one billion, five hundred fifteen million, four hundred thirty-six thousand, five hundred eleven".