123577977463617 has 4 divisors (see below), whose sum is σ = 164770636618160. Its totient is φ = 82385318309076.

The previous prime is 123577977463559. The next prime is 123577977463687. The reversal of 123577977463617 is 716364779775321.

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.

It is not a de Polignac number, because 123577977463617 - 2¹⁰ = 123577977462593 is a prime.

It is a super-2 number, since 2×123577977463617² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123577977463687) 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, 20596329577267 + ... + 20596329577272.

It is an arithmetic number, because the mean of its divisors is an integer number (41192659154540).

Almost surely, 2^{123577977463617} is an apocalyptic number.

It is an amenable number.

123577977463617 is a deficient number, since it is larger than the sum of its proper divisors (41192659154543).

123577977463617 is an equidigital number, since it uses as much as digits as its factorization.

123577977463617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41192659154542.

The product of its digits is 1960368480, while the sum is 75.

The spelling of 123577977463617 in words is "one hundred twenty-three trillion, five hundred seventy-seven billion, nine hundred seventy-seven million, four hundred sixty-three thousand, six hundred seventeen".