612172453813440 has 448 divisors, whose sum is σ = 2121668813214720. Its totient is φ = 148648328478720.

The previous prime is 612172453813433. The next prime is 612172453813451. The reversal of 612172453813440 is 44318354271216.

It is a super-2 number, since 2×612172453813440² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307801405 + ... + 309783875.

It is an arithmetic number, because the mean of its divisors is an integer number (4735867886640).

Almost surely, 2^{612172453813440} is an apocalyptic number.

612172453813440 is a gapful number since it is divisible by the number (60) 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 612172453813440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060834406607360).

612172453813440 is an abundant number, since it is smaller than the sum of its proper divisors (1509496359401280).

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

612172453813440 is a wasteful number, since it uses less digits than its factorization.

612172453813440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982840 (or 1982830 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 612172453813440 in words is "six hundred twelve trillion, one hundred seventy-two billion, four hundred fifty-three million, eight hundred thirteen thousand, four hundred forty".