138817859475 has 12 divisors (see below), whose sum is σ = 229512194456. Its totient is φ = 74036191680.

The previous prime is 138817859471. The next prime is 138817859483. The reversal of 138817859475 is 574958718831.

It is not a de Polignac number, because 138817859475 - 2² = 138817859471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138817859471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925452322 + ... + 925452471.

Almost surely, 2^138817859475 is an apocalyptic number.

138817859475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138817859475 is a deficient number, since it is larger than the sum of its proper divisors (90694334981).

138817859475 is a wasteful number, since it uses less digits than its factorization.

138817859475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850904806 (or 1850904801 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 66.

The spelling of 138817859475 in words is "one hundred thirty-eight billion, eight hundred seventeen million, eight hundred fifty-nine thousand, four hundred seventy-five".