612913919904 has 384 divisors, whose sum is σ = 2102581877760. Its totient is φ = 171249638400.

The previous prime is 612913919809. The next prime is 612913919929. The reversal of 612913919904 is 409919319216.

It is a happy number.

612913919904 is a `hidden beast` number, since 612 + 9 + 1 + 3 + 9 + 19 + 9 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134792959 + ... + 134797505.

It is an arithmetic number, because the mean of its divisors is an integer number (5475473640).

Almost surely, 2^612913919904 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 612913919904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051290938880).

612913919904 is an abundant number, since it is smaller than the sum of its proper divisors (1489667957856).

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

612913919904 is a wasteful number, since it uses less digits than its factorization.

612913919904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681 (or 5667 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 612913919904 in words is "six hundred twelve billion, nine hundred thirteen million, nine hundred nineteen thousand, nine hundred four".