109771956139 has 4 divisors (see below), whose sum is σ = 109773175024. Its totient is φ = 109770737256.

The previous prime is 109771956137. The next prime is 109771956149. The reversal of 109771956139 is 931659177901.

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 109771956139 - 2¹ = 109771956137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109771956131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462552 + ... + 658405.

It is an arithmetic number, because the mean of its divisors is an integer number (27443293756).

Almost surely, 2^109771956139 is an apocalyptic number.

109771956139 is a deficient number, since it is larger than the sum of its proper divisors (1218885).

109771956139 is an equidigital number, since it uses as much as digits as its factorization.

109771956139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218884.

The product of its (nonzero) digits is 3214890, while the sum is 58.

The spelling of 109771956139 in words is "one hundred nine billion, seven hundred seventy-one million, nine hundred fifty-six thousand, one hundred thirty-nine".