12499791400 has 144 divisors (see below), whose sum is σ = 30336495840. Its totient is φ = 4788806400.

The previous prime is 12499791377. The next prime is 12499791407. The reversal of 12499791400 is 419799421.

It is not an unprimeable number, because it can be changed into a prime (12499791407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19439479 + ... + 19440121.

It is an arithmetic number, because the mean of its divisors is an integer number (210670110).

Almost surely, 2^12499791400 is an apocalyptic number.

12499791400 is a gapful number since it is divisible by the number (10) 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 12499791400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15168247920).

12499791400 is an abundant number, since it is smaller than the sum of its proper divisors (17836704440).

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

12499791400 is a wasteful number, since it uses less digits than its factorization.

12499791400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 12499791400 in words is "twelve billion, four hundred ninety-nine million, seven hundred ninety-one thousand, four hundred".