612556000100561 has 16 divisors (see below), whose sum is σ = 682990645690368. Its totient is φ = 544702825976400.

The previous prime is 612556000100557. The next prime is 612556000100579. The reversal of 612556000100561 is 165001000655216.

It is a happy number.

It is not a de Polignac number, because 612556000100561 - 2² = 612556000100557 is a prime.

It is a super-2 number, since 2×612556000100561² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612556000100531) 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 15 ways as a sum of consecutive naturals, for example, 3087785315 + ... + 3087983688.

It is an arithmetic number, because the mean of its divisors is an integer number (42686915355648).

Almost surely, 2^{612556000100561} is an apocalyptic number.

It is an amenable number.

612556000100561 is a deficient number, since it is larger than the sum of its proper divisors (70434645589807).

612556000100561 is a wasteful number, since it uses less digits than its factorization.

612556000100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6175769212.

The product of its (nonzero) digits is 54000, while the sum is 38.

Adding to 612556000100561 its reverse (165001000655216), we get a palindrome (777557000755777).

The spelling of 612556000100561 in words is "six hundred twelve trillion, five hundred fifty-six billion, one hundred thousand, five hundred sixty-one".