128393722047 has 4 divisors (see below), whose sum is σ = 171191629400. Its totient is φ = 85595814696.

The previous prime is 128393722033. The next prime is 128393722049. The reversal of 128393722047 is 740227393821.

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

It is not a de Polignac number, because 128393722047 - 2⁴ = 128393722031 is a prime.

It is a super-2 number, since 2×128393722047² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128393721987 and 128393722005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128393722049) 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, 21398953672 + ... + 21398953677.

It is an arithmetic number, because the mean of its divisors is an integer number (42797907350).

Almost surely, 2^128393722047 is an apocalyptic number.

128393722047 is a deficient number, since it is larger than the sum of its proper divisors (42797907353).

128393722047 is an equidigital number, since it uses as much as digits as its factorization.

128393722047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42797907352.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 128393722047 in words is "one hundred twenty-eight billion, three hundred ninety-three million, seven hundred twenty-two thousand, forty-seven".