128905400451 has 12 divisors (see below), whose sum is σ = 175177968728. Its totient is φ = 84315476544.

The previous prime is 128905400441. The next prime is 128905400453. The reversal of 128905400451 is 154004509821.

It is not a de Polignac number, because 128905400451 - 2¹¹ = 128905398403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128905400453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7639930 + ... + 7656783.

Almost surely, 2^128905400451 is an apocalyptic number.

128905400451 is a deficient number, since it is larger than the sum of its proper divisors (46272568277).

128905400451 is an equidigital number, since it uses as much as digits as its factorization.

128905400451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15296822 (or 15296769 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 128905400451 in words is "one hundred twenty-eight billion, nine hundred five million, four hundred thousand, four hundred fifty-one".