128622640998 has 8 divisors (see below), whose sum is σ = 257245282008. Its totient is φ = 42874213664.

The previous prime is 128622640969. The next prime is 128622641009. The reversal of 128622640998 is 899046226821.

It is a happy number.

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

128622640998 is an admirable number.

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, 10718553411 + ... + 10718553422.

It is an arithmetic number, because the mean of its divisors is an integer number (32155660251).

Almost surely, 2^128622640998 is an apocalyptic number.

128622640998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128622640998 is a wasteful number, since it uses less digits than its factorization.

128622640998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21437106838.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 128622640998 in words is "one hundred twenty-eight billion, six hundred twenty-two million, six hundred forty thousand, nine hundred ninety-eight".