138986452187 has 24 divisors (see below), whose sum is σ = 154272506256. Its totient is φ = 124173440000.

The previous prime is 138986452133. The next prime is 138986452211. The reversal of 138986452187 is 781254689831.

It is not a de Polignac number, because 138986452187 - 2⁶ = 138986452123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138986452487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15368387 + ... + 15377427.

It is an arithmetic number, because the mean of its divisors is an integer number (6428021094).

Almost surely, 2^138986452187 is an apocalyptic number.

138986452187 is a deficient number, since it is larger than the sum of its proper divisors (15286054069).

138986452187 is a wasteful number, since it uses less digits than its factorization.

138986452187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391 (or 9290 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 62.

The spelling of 138986452187 in words is "one hundred thirty-eight billion, nine hundred eighty-six million, four hundred fifty-two thousand, one hundred eighty-seven".