612868387131 has 128 divisors (see below), whose sum is σ = 1252019865600. Its totient is φ = 285939694080.

The previous prime is 612868387091. The next prime is 612868387139. The reversal of 612868387131 is 131783868216.

It is a happy number.

612868387131 is a `hidden beast` number, since 6 + 128 + 6 + 8 + 387 + 131 = 666.

It is not a de Polignac number, because 612868387131 - 2⁶ = 612868387067 is a prime.

It is a super-2 number, since 2×612868387131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (612868387139) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 693565 + ... + 1306433.

It is an arithmetic number, because the mean of its divisors is an integer number (9781405200).

Almost surely, 2^612868387131 is an apocalyptic number.

612868387131 is an abundant number, since it is smaller than the sum of its proper divisors (639151478469).

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

612868387131 is a wasteful number, since it uses less digits than its factorization.

612868387131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612946 (or 612940 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

It can be divided in two parts, 612868 and 387131, that added together give a palindrome (999999).

The spelling of 612868387131 in words is "six hundred twelve billion, eight hundred sixty-eight million, three hundred eighty-seven thousand, one hundred thirty-one".