12356457990 has 96 divisors (see below), whose sum is σ = 31628171520. Its totient is φ = 3088866816.

The previous prime is 12356457937. The next prime is 12356458003. The reversal of 12356457990 is 9975465321.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 2277501 + ... + 2282919.

It is an arithmetic number, because the mean of its divisors is an integer number (329460120).

Almost surely, 2^12356457990 is an apocalyptic number.

12356457990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12356457990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15814085760).

12356457990 is an abundant number, since it is smaller than the sum of its proper divisors (19271713530).

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

12356457990 is a wasteful number, since it uses less digits than its factorization.

12356457990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726 (or 5709 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 12356457990 in words is "twelve billion, three hundred fifty-six million, four hundred fifty-seven thousand, nine hundred ninety".