128309722970 has 48 divisors (see below), whose sum is σ = 272825576352. Its totient is φ = 43068991680.

The previous prime is 128309722963. The next prime is 128309722973. The reversal of 128309722970 is 79227903821.

It is not an unprimeable number, because it can be changed into a prime (128309722973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3432452 + ... + 3469631.

It is an arithmetic number, because the mean of its divisors is an integer number (5683866174).

Almost surely, 2^128309722970 is an apocalyptic number.

128309722970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128309722970 is an abundant number, since it is smaller than the sum of its proper divisors (144515853382).

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

128309722970 is a wasteful number, since it uses less digits than its factorization.

128309722970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902127 (or 6902114 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 128309722970 in words is "one hundred twenty-eight billion, three hundred nine million, seven hundred twenty-two thousand, nine hundred seventy".