138542374894 has 24 divisors (see below), whose sum is σ = 263718882648. Its totient is φ = 53977548240.

The previous prime is 138542374889. The next prime is 138542374897. The reversal of 138542374894 is 498473245831.

138542374894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138542374894² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138542374897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64257909 + ... + 64260064.

It is an arithmetic number, because the mean of its divisors is an integer number (10988286777).

Almost surely, 2^138542374894 is an apocalyptic number.

138542374894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138542374894 is a deficient number, since it is larger than the sum of its proper divisors (125176507754).

138542374894 is a wasteful number, since it uses less digits than its factorization.

138542374894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128518000 (or 128517993 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 58.

The spelling of 138542374894 in words is "one hundred thirty-eight billion, five hundred forty-two million, three hundred seventy-four thousand, eight hundred ninety-four".