12257317044 has 144 divisors (see below), whose sum is σ = 38142074880. Its totient is φ = 3241719360.

The previous prime is 12257317027. The next prime is 12257317097. The reversal of 12257317044 is 44071375221.

12257317044 is a `hidden beast` number, since 12 + 2 + 573 + 1 + 70 + 4 + 4 = 666.

It is a super-2 number, since 2×12257317044² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145567 + ... + 213785.

It is an arithmetic number, because the mean of its divisors is an integer number (264875520).

Almost surely, 2^12257317044 is an apocalyptic number.

12257317044 is a gapful number since it is divisible by the number (14) 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 12257317044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19071037440).

12257317044 is an abundant number, since it is smaller than the sum of its proper divisors (25884757836).

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

12257317044 is a wasteful number, since it uses less digits than its factorization.

12257317044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68290 (or 68285 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 12257317044 in words is "twelve billion, two hundred fifty-seven million, three hundred seventeen thousand, forty-four".