128596431649 has 8 divisors (see below), whose sum is σ = 146997194688. Its totient is φ = 110203129680.

The previous prime is 128596431629. The next prime is 128596431661. The reversal of 128596431649 is 946134695821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128596431649 - 2²⁵ = 128562877217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128596431593 and 128596431602.

It is not an unprimeable number, because it can be changed into a prime (128596431629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1828282 + ... + 1897315.

It is an arithmetic number, because the mean of its divisors is an integer number (18374649336).

Almost surely, 2^128596431649 is an apocalyptic number.

It is an amenable number.

128596431649 is a deficient number, since it is larger than the sum of its proper divisors (18400763039).

128596431649 is an equidigital number, since it uses as much as digits as its factorization.

128596431649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730535.

The product of its digits is 11197440, while the sum is 58.

The spelling of 128596431649 in words is "one hundred twenty-eight billion, five hundred ninety-six million, four hundred thirty-one thousand, six hundred forty-nine".