138191151856 has 20 divisors (see below), whose sum is σ = 267782577832. Its totient is φ = 69085970496.

The previous prime is 138191151851. The next prime is 138191151877. The reversal of 138191151856 is 658151191831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138191151851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480930 + ... + 712513.

Almost surely, 2^138191151856 is an apocalyptic number.

138191151856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138191151856 is a deficient number, since it is larger than the sum of its proper divisors (129591425976).

138191151856 is a wasteful number, since it uses less digits than its factorization.

138191151856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200688 (or 1200682 counting only the distinct ones).

The product of its digits is 259200, while the sum is 49.

The spelling of 138191151856 in words is "one hundred thirty-eight billion, one hundred ninety-one million, one hundred fifty-one thousand, eight hundred fifty-six".