612622656 has 112 divisors (see below), whose sum is σ = 1845137280. Its totient is φ = 199203840.

The previous prime is 612622639. The next prime is 612622657. The reversal of 612622656 is 656226216.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 612622656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612622657) 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, 66525 + ... + 75171.

It is an arithmetic number, because the mean of its divisors is an integer number (16474440).

Almost surely, 2^612622656 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 612622656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922568640).

612622656 is an abundant number, since it is smaller than the sum of its proper divisors (1232514624).

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

612622656 is a wasteful number, since it uses less digits than its factorization.

612622656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8709 (or 8693 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 612622656 is about 24751.2152428926. The cubic root of 612622656 is about 849.3063110786.

It can be divided in two parts, 612622 and 656, that added together give a triangular number (613278 = T₁₁₀₇).

The spelling of 612622656 in words is "six hundred twelve million, six hundred twenty-two thousand, six hundred fifty-six".