612660564 has 72 divisors (see below), whose sum is σ = 1641548160. Its totient is φ = 197598960.

The previous prime is 612660527. The next prime is 612660571. The reversal of 612660564 is 465066216.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100837 + ... + 106739.

It is an arithmetic number, because the mean of its divisors is an integer number (22799280).

Almost surely, 2^612660564 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 612660564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820774080).

612660564 is an abundant number, since it is smaller than the sum of its proper divisors (1028887596).

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

612660564 is a wasteful number, since it uses less digits than its factorization.

612660564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978 (or 5939 counting only the distinct ones).

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

The square root of 612660564 is about 24751.9810116281. The cubic root of 612660564 is about 849.3238285717.

The spelling of 612660564 in words is "six hundred twelve million, six hundred sixty thousand, five hundred sixty-four".