128761617423 has 4 divisors (see below), whose sum is σ = 171682156568. Its totient is φ = 85841078280.

The previous prime is 128761617409. The next prime is 128761617449. The reversal of 128761617423 is 324716167821.

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

It is not a de Polignac number, because 128761617423 - 2⁸ = 128761617167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128761610423) 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, 21460269568 + ... + 21460269573.

It is an arithmetic number, because the mean of its divisors is an integer number (42920539142).

Almost surely, 2^128761617423 is an apocalyptic number.

128761617423 is a deficient number, since it is larger than the sum of its proper divisors (42920539145).

128761617423 is an equidigital number, since it uses as much as digits as its factorization.

128761617423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42920539144.

The product of its digits is 677376, while the sum is 48.

The spelling of 128761617423 in words is "one hundred twenty-eight billion, seven hundred sixty-one million, six hundred seventeen thousand, four hundred twenty-three".