12500138775 has 24 divisors (see below), whose sum is σ = 21056844240. Its totient is φ = 6540951040.

The previous prime is 12500138771. The next prime is 12500138809. The reversal of 12500138775 is 57783100521.

It is not a de Polignac number, because 12500138775 - 2² = 12500138771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500138771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1568370 + ... + 1576319.

It is an arithmetic number, because the mean of its divisors is an integer number (877368510).

Almost surely, 2^12500138775 is an apocalyptic number.

12500138775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12500138775 is a deficient number, since it is larger than the sum of its proper divisors (8556705465).

12500138775 is a wasteful number, since it uses less digits than its factorization.

12500138775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144755 (or 3144750 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 12500138775 in words is "twelve billion, five hundred million, one hundred thirty-eight thousand, seven hundred seventy-five".