117279443577 has 4 divisors (see below), whose sum is σ = 156372591440. Its totient is φ = 78186295716.

The previous prime is 117279443563. The next prime is 117279443581. The reversal of 117279443577 is 775344972711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 775344972711 = 3 ⋅258448324237.

It is not a de Polignac number, because 117279443577 - 2⁶ = 117279443513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117279443507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19546573927 + ... + 19546573932.

It is an arithmetic number, because the mean of its divisors is an integer number (39093147860).

Almost surely, 2^117279443577 is an apocalyptic number.

It is an amenable number.

117279443577 is a deficient number, since it is larger than the sum of its proper divisors (39093147863).

117279443577 is an equidigital number, since it uses as much as digits as its factorization.

117279443577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39093147862.

The product of its digits is 10372320, while the sum is 57.

The spelling of 117279443577 in words is "one hundred seventeen billion, two hundred seventy-nine million, four hundred forty-three thousand, five hundred seventy-seven".