12638251950 has 24 divisors (see below), whose sum is σ = 31342865208. Its totient is φ = 3370200480.

The previous prime is 12638251943. The next prime is 12638251973. The reversal of 12638251950 is 5915283621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42127357 + ... + 42127656.

It is an arithmetic number, because the mean of its divisors is an integer number (1305952717).

Almost surely, 2^12638251950 is an apocalyptic number.

12638251950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638251950 is an abundant number, since it is smaller than the sum of its proper divisors (18704613258).

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

12638251950 is a wasteful number, since it uses less digits than its factorization.

12638251950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84255028 (or 84255023 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 12638251950 in words is "twelve billion, six hundred thirty-eight million, two hundred fifty-one thousand, nine hundred fifty".