139752113218 has 4 divisors (see below), whose sum is σ = 209628169830. Its totient is φ = 69876056608.

The previous prime is 139752113209. The next prime is 139752113219. The reversal of 139752113218 is 812311257931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812311257931 = 337 ⋅2410419163.

It can be written as a sum of positive squares in only one way, i.e., 137895623649 + 1856489569 = 371343^2 + 43087^2 .

It is not an unprimeable number, because it can be changed into a prime (139752113219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34938028303 + ... + 34938028306.

Almost surely, 2^139752113218 is an apocalyptic number.

139752113218 is a deficient number, since it is larger than the sum of its proper divisors (69876056612).

139752113218 is an equidigital number, since it uses as much as digits as its factorization.

139752113218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69876056611.

The product of its digits is 90720, while the sum is 43.

The spelling of 139752113218 in words is "one hundred thirty-nine billion, seven hundred fifty-two million, one hundred thirteen thousand, two hundred eighteen".