139231554365 has 4 divisors (see below), whose sum is σ = 167077865244. Its totient is φ = 111385243488.

The previous prime is 139231554313. The next prime is 139231554377. The reversal of 139231554365 is 563455132931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85127398756 + 54104155609 = 291766^2 + 232603^2 .

It is a cyclic number.

It is not a de Polignac number, because 139231554365 - 2²⁸ = 138963118909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13923155432 + ... + 13923155441.

It is an arithmetic number, because the mean of its divisors is an integer number (41769466311).

Almost surely, 2^139231554365 is an apocalyptic number.

It is an amenable number.

139231554365 is a deficient number, since it is larger than the sum of its proper divisors (27846310879).

139231554365 is an equidigital number, since it uses as much as digits as its factorization.

139231554365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27846310878.

The product of its digits is 1458000, while the sum is 47.

The spelling of 139231554365 in words is "one hundred thirty-nine billion, two hundred thirty-one million, five hundred fifty-four thousand, three hundred sixty-five".