128263281694 has 8 divisors (see below), whose sum is σ = 192421639728. Its totient is φ = 64122735120.

The previous prime is 128263281673. The next prime is 128263281709. The reversal of 128263281694 is 496182362821.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4434847 + ... + 4463674.

It is an arithmetic number, because the mean of its divisors is an integer number (24052704966).

Almost surely, 2^128263281694 is an apocalyptic number.

128263281694 is a deficient number, since it is larger than the sum of its proper divisors (64158358034).

128263281694 is an equidigital number, since it uses as much as digits as its factorization.

128263281694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905730.

The product of its digits is 1990656, while the sum is 52.

The spelling of 128263281694 in words is "one hundred twenty-eight billion, two hundred sixty-three million, two hundred eighty-one thousand, six hundred ninety-four".