138994429833 has 72 divisors (see below), whose sum is σ = 245979040320. Its totient is φ = 75202706880.

The previous prime is 138994429831. The next prime is 138994429837. The reversal of 138994429833 is 338924499831.

138994429833 is a `hidden beast` number, since 13 + 8 + 99 + 442 + 98 + 3 + 3 = 666.

138994429833 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138994429833 - 2¹ = 138994429831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (138994429831) 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 71 ways as a sum of consecutive naturals, for example, 19946916 + ... + 19953882.

It is an arithmetic number, because the mean of its divisors is an integer number (3416375560).

Almost surely, 2^138994429833 is an apocalyptic number.

It is an amenable number.

138994429833 is a deficient number, since it is larger than the sum of its proper divisors (106984610487).

138994429833 is a wasteful number, since it uses less digits than its factorization.

138994429833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387 (or 9377 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 63.

The spelling of 138994429833 in words is "one hundred thirty-eight billion, nine hundred ninety-four million, four hundred twenty-nine thousand, eight hundred thirty-three".