612444506544 has 80 divisors (see below), whose sum is σ = 1893168933600. Its totient is φ = 188444461824.

The previous prime is 612444506539. The next prime is 612444506563. The reversal of 612444506544 is 445605444216.

612444506544 is a `hidden beast` number, since 6 + 12 + 4 + 44 + 50 + 6 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 612444506544.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54521139 + ... + 54532370.

It is an arithmetic number, because the mean of its divisors is an integer number (23664611670).

Almost surely, 2^612444506544 is an apocalyptic number.

It is an amenable number.

612444506544 is an abundant number, since it is smaller than the sum of its proper divisors (1280724427056).

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

612444506544 is a wasteful number, since it uses less digits than its factorization.

612444506544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109053539 (or 109053527 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 45.

The spelling of 612444506544 in words is "six hundred twelve billion, four hundred forty-four million, five hundred six thousand, five hundred forty-four".