612139164 has 144 divisors (see below), whose sum is σ = 1815494688. Its totient is φ = 159086592.

The previous prime is 612139159. The next prime is 612139201. The reversal of 612139164 is 461931216.

It is a super-2 number, since 2×612139164² = 749428712205237792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 557464 + ... + 558560.

It is an arithmetic number, because the mean of its divisors is an integer number (12607602).

Almost surely, 2^612139164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612139164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907747344).

612139164 is an abundant number, since it is smaller than the sum of its proper divisors (1203355524).

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

612139164 is a wasteful number, since it uses less digits than its factorization.

612139164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1195 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 612139164 is about 24741.4462794720. The cubic root of 612139164 is about 849.0828233811.

The spelling of 612139164 in words is "six hundred twelve million, one hundred thirty-nine thousand, one hundred sixty-four".