12499937500 has 42 divisors (see below), whose sum is σ = 27343400000. Its totient is φ = 4999950000.

The previous prime is 12499937491. The next prime is 12499937507. The reversal of 12499937500 is 573999421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12499937507) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 37500 + ... + 162499.

Almost surely, 2^12499937500 is an apocalyptic number.

12499937500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12499937500 is an abundant number, since it is smaller than the sum of its proper divisors (14843462500).

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

12499937500 is an frugal number, since it uses more digits than its factorization.

12499937500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200033 (or 200006 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 12499937500 in words is "twelve billion, four hundred ninety-nine million, nine hundred thirty-seven thousand, five hundred".