138589093858 has 4 divisors (see below), whose sum is σ = 207883640790. Its totient is φ = 69294546928.

The previous prime is 138589093847. The next prime is 138589093889. The reversal of 138589093858 is 858390985831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 134771954769 + 3817139089 = 367113^2 + 61783^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 138589093793 and 138589093802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34647273463 + ... + 34647273466.

Almost surely, 2^138589093858 is an apocalyptic number.

138589093858 is a deficient number, since it is larger than the sum of its proper divisors (69294546932).

138589093858 is an equidigital number, since it uses as much as digits as its factorization.

138589093858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69294546931.

The product of its (nonzero) digits is 74649600, while the sum is 67.

The spelling of 138589093858 in words is "one hundred thirty-eight billion, five hundred eighty-nine million, ninety-three thousand, eight hundred fifty-eight".