612912568 has 8 divisors (see below), whose sum is σ = 1149211080. Its totient is φ = 306456280.

The previous prime is 612912539. The next prime is 612912607. The reversal of 612912568 is 865219216.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 612912568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38307028 + ... + 38307043.

It is an arithmetic number, because the mean of its divisors is an integer number (143651385).

Almost surely, 2^612912568 is an apocalyptic number.

It is an amenable number.

612912568 is a deficient number, since it is larger than the sum of its proper divisors (536298512).

612912568 is a wasteful number, since it uses less digits than its factorization.

612912568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76614077 (or 76614073 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 612912568 is about 24757.0710707062. The cubic root of 612912568 is about 849.4402626276.

The spelling of 612912568 in words is "six hundred twelve million, nine hundred twelve thousand, five hundred sixty-eight".