138888751250 has 40 divisors (see below), whose sum is σ = 260499435372. Its totient is φ = 55520000000.

The previous prime is 138888751247. The next prime is 138888751271. The reversal of 138888751250 is 52157888831.

It can be written as a sum of positive squares in 10 ways, for example, as 3886150921 + 135002600329 = 62339^2 + 367427^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1966550 + ... + 2035950.

Almost surely, 2^138888751250 is an apocalyptic number.

138888751250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138888751250 is a deficient number, since it is larger than the sum of its proper divisors (121610684122).

138888751250 is an equidigital number, since it uses as much as digits as its factorization.

138888751250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71024 (or 71009 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 56.

The spelling of 138888751250 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, seven hundred fifty-one thousand, two hundred fifty".