139304791855 has 4 divisors (see below), whose sum is σ = 167165750232. Its totient is φ = 111443833480.

The previous prime is 139304791849. The next prime is 139304791939. The reversal of 139304791855 is 558197403931.

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

It is not a de Polignac number, because 139304791855 - 2²³ = 139296403247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139304791796 and 139304791805.

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, 13930479181 + ... + 13930479190.

It is an arithmetic number, because the mean of its divisors is an integer number (41791437558).

Almost surely, 2^139304791855 is an apocalyptic number.

139304791855 is a deficient number, since it is larger than the sum of its proper divisors (27860958377).

139304791855 is an equidigital number, since it uses as much as digits as its factorization.

139304791855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27860958376.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 139304791855 in words is "one hundred thirty-nine billion, three hundred four million, seven hundred ninety-one thousand, eight hundred fifty-five".