128849520790 has 8 divisors (see below), whose sum is σ = 231929137440. Its totient is φ = 51539808312.

The previous prime is 128849520731. The next prime is 128849520791. The reversal of 128849520790 is 97025948821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128849520791) 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, 6442476030 + ... + 6442476049.

It is an arithmetic number, because the mean of its divisors is an integer number (28991142180).

Almost surely, 2^128849520790 is an apocalyptic number.

128849520790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128849520790 is a deficient number, since it is larger than the sum of its proper divisors (103079616650).

128849520790 is a wasteful number, since it uses less digits than its factorization.

128849520790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12884952086.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 128849520790 in words is "one hundred twenty-eight billion, eight hundred forty-nine million, five hundred twenty thousand, seven hundred ninety".