128915379250 has 32 divisors (see below), whose sum is σ = 275805249408. Its totient is φ = 44199558000.

The previous prime is 128915379143. The next prime is 128915379301. The reversal of 128915379250 is 52973519821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36831216 + ... + 36834715.

It is an arithmetic number, because the mean of its divisors is an integer number (8618914044).

Almost surely, 2^128915379250 is an apocalyptic number.

128915379250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128915379250 is an abundant number, since it is smaller than the sum of its proper divisors (146889870158).

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

128915379250 is an equidigital number, since it uses as much as digits as its factorization.

128915379250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73665955 (or 73665945 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 128915379250 in words is "one hundred twenty-eight billion, nine hundred fifteen million, three hundred seventy-nine thousand, two hundred fifty".