12638876450 has 24 divisors (see below), whose sum is σ = 23512304640. Its totient is φ = 5054691600.

The previous prime is 12638876431. The next prime is 12638876531. The reversal of 12638876450 is 5467883621.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333995 + ... + 369905.

It is an arithmetic number, because the mean of its divisors is an integer number (979679360).

Almost surely, 2^12638876450 is an apocalyptic number.

12638876450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638876450 is a deficient number, since it is larger than the sum of its proper divisors (10873428190).

12638876450 is a wasteful number, since it uses less digits than its factorization.

12638876450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42962 (or 42957 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 12638876450 in words is "twelve billion, six hundred thirty-eight million, eight hundred seventy-six thousand, four hundred fifty".