128426774953 has 4 divisors (see below), whose sum is σ = 128427638868. Its totient is φ = 128425911040.

The previous prime is 128426774947. The next prime is 128426774963. The reversal of 128426774953 is 359477624821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 65870762409 + 62556012544 = 256653^2 + 250112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128426774953 is a prime.

It is a super-3 number, since 3×128426774953³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128426774963) 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, 145768 + ... + 527353.

It is an arithmetic number, because the mean of its divisors is an integer number (32106909717).

Almost surely, 2^128426774953 is an apocalyptic number.

It is an amenable number.

128426774953 is a deficient number, since it is larger than the sum of its proper divisors (863915).

128426774953 is an equidigital number, since it uses as much as digits as its factorization.

128426774953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863914.

The product of its digits is 20321280, while the sum is 58.

The spelling of 128426774953 in words is "one hundred twenty-eight billion, four hundred twenty-six million, seven hundred seventy-four thousand, nine hundred fifty-three".