128589257212 has 24 divisors (see below), whose sum is σ = 242381753600. Its totient is φ = 59338979136.

The previous prime is 128589257207. The next prime is 128589257219. The reversal of 128589257212 is 212752985821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 128589257212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128589257219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112714 + ... + 519502.

Almost surely, 2^128589257212 is an apocalyptic number.

It is an amenable number.

128589257212 is a deficient number, since it is larger than the sum of its proper divisors (113792496388).

128589257212 is a wasteful number, since it uses less digits than its factorization.

128589257212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412885 (or 412883 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 52.

The spelling of 128589257212 in words is "one hundred twenty-eight billion, five hundred eighty-nine million, two hundred fifty-seven thousand, two hundred twelve".