138888887570 has 32 divisors (see below), whose sum is σ = 251852025600. Its totient is φ = 55144164096.

The previous prime is 138888887513. The next prime is 138888887581. The reversal of 138888887570 is 75788888831.

It is a junction number, because it is equal to n+sod(n) for n = 138888887494 and 138888887503.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9802151 + ... + 9816309.

It is an arithmetic number, because the mean of its divisors is an integer number (7870375800).

Almost surely, 2^138888887570 is an apocalyptic number.

138888887570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138888887570 is a deficient number, since it is larger than the sum of its proper divisors (112963138030).

138888887570 is a wasteful number, since it uses less digits than its factorization.

138888887570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21362.

The product of its (nonzero) digits is 192675840, while the sum is 71.

The spelling of 138888887570 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, eight hundred eighty-seven thousand, five hundred seventy".