612680644 has 12 divisors (see below), whose sum is σ = 1072527484. Its totient is φ = 306244224.

The previous prime is 612680633. The next prime is 612680657. The reversal of 612680644 is 446086216.

It can be written as a sum of positive squares in 2 ways, for example, as 122943744 + 489736900 = 11088^2 + 22130^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8577 + ... + 36040.

Almost surely, 2^612680644 is an apocalyptic number.

It is an amenable number.

612680644 is a deficient number, since it is larger than the sum of its proper divisors (459846840).

612680644 is a wasteful number, since it uses less digits than its factorization.

612680644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48054 (or 48052 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 612680644 is about 24752.3866324038. The cubic root of 612680644 is about 849.3331073563. Note that the first 3 decimals are identical.

The spelling of 612680644 in words is "six hundred twelve million, six hundred eighty thousand, six hundred forty-four".