612581838256 has 20 divisors (see below), whose sum is σ = 1227804116400. Its totient is φ = 295729163072.

The previous prime is 612581838233. The next prime is 612581838283. The reversal of 612581838256 is 652838185216.

It is a super-2 number, since 2×612581838256² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 612581838197 and 612581838206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660109276 + ... + 660110203.

It is an arithmetic number, because the mean of its divisors is an integer number (61390205820).

Almost surely, 2^612581838256 is an apocalyptic number.

It is an amenable number.

612581838256 is an abundant number, since it is smaller than the sum of its proper divisors (615222278144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612581838256 is a wasteful number, since it uses less digits than its factorization.

612581838256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320219516 (or 1320219510 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The spelling of 612581838256 in words is "six hundred twelve billion, five hundred eighty-one million, eight hundred thirty-eight thousand, two hundred fifty-six".