12501139890 has 32 divisors (see below), whose sum is σ = 31767603840. Its totient is φ = 3137540864.

The previous prime is 12501139879. The next prime is 12501139897. The reversal of 12501139890 is 9893110521.

It is not an unprimeable number, because it can be changed into a prime (12501139897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12255510 + ... + 12256529.

It is an arithmetic number, because the mean of its divisors is an integer number (992737620).

Almost surely, 2^12501139890 is an apocalyptic number.

12501139890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12501139890 is an abundant number, since it is smaller than the sum of its proper divisors (19266463950).

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

12501139890 is a wasteful number, since it uses less digits than its factorization.

12501139890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24512066.

The product of its (nonzero) digits is 19440, while the sum is 39.

The spelling of 12501139890 in words is "twelve billion, five hundred one million, one hundred thirty-nine thousand, eight hundred ninety".