12638750001250 has 20 divisors (see below), whose sum is σ = 23690073004686. Its totient is φ = 5055500000000.

The previous prime is 12638750001247. The next prime is 12638750001263. The reversal of 12638750001250 is 5210005783621.

It can be written as a sum of positive squares in 5 ways, for example, as 1647595586569 + 10991154414681 = 1283587^2 + 3315291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5055498751 + ... + 5055501250.

Almost surely, 2^{12638750001250} is an apocalyptic number.

12638750001250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638750001250 is a deficient number, since it is larger than the sum of its proper divisors (11051323003436).

12638750001250 is an equidigital number, since it uses as much as digits as its factorization.

12638750001250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111000023 (or 10111000008 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

Adding to 12638750001250 its reverse (5210005783621), we get a palindrome (17848755784871).

The spelling of 12638750001250 in words is "twelve trillion, six hundred thirty-eight billion, seven hundred fifty million, one thousand, two hundred fifty".