139351577991 has 4 divisors (see below), whose sum is σ = 185802103992. Its totient is φ = 92901051992.

The previous prime is 139351577987. The next prime is 139351577993. The reversal of 139351577991 is 199775153931.

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

It is a cyclic number.

It is not a de Polignac number, because 139351577991 - 2² = 139351577987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139351577993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23225262996 + ... + 23225263001.

It is an arithmetic number, because the mean of its divisors is an integer number (46450525998).

Almost surely, 2^139351577991 is an apocalyptic number.

139351577991 is a deficient number, since it is larger than the sum of its proper divisors (46450526001).

139351577991 is an equidigital number, since it uses as much as digits as its factorization.

139351577991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46450526000.

The product of its digits is 8037225, while the sum is 60.

The spelling of 139351577991 in words is "one hundred thirty-nine billion, three hundred fifty-one million, five hundred seventy-seven thousand, nine hundred ninety-one".