138888901654 has 8 divisors (see below), whose sum is σ = 217391324400. Its totient is φ = 66425126856.

The previous prime is 138888901639. The next prime is 138888901661. The reversal of 138888901654 is 456109888831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 138888901592 and 138888901601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509661929 + ... + 1509662020.

It is an arithmetic number, because the mean of its divisors is an integer number (27173915550).

Almost surely, 2^138888901654 is an apocalyptic number.

138888901654 is a deficient number, since it is larger than the sum of its proper divisors (78502422746).

138888901654 is a wasteful number, since it uses less digits than its factorization.

138888901654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019323974.

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 138888901654 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, nine hundred one thousand, six hundred fifty-four".