612561612 has 96 divisors (see below), whose sum is σ = 1682601984. Its totient is φ = 171648000.

The previous prime is 612561589. The next prime is 612561613. The reversal of 612561612 is 216165216.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 612561612.

It is not an unprimeable number, because it can be changed into a prime (612561613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78487 + ... + 85937.

It is an arithmetic number, because the mean of its divisors is an integer number (17527104).

Almost surely, 2^612561612 is an apocalyptic number.

612561612 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612561612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841300992).

612561612 is an abundant number, since it is smaller than the sum of its proper divisors (1070040372).

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

612561612 is a wasteful number, since it uses less digits than its factorization.

612561612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519 (or 7517 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 612561612 is about 24749.9820605996. The cubic root of 612561612 is about 849.2781007950.

The spelling of 612561612 in words is "six hundred twelve million, five hundred sixty-one thousand, six hundred twelve".