128441612520 has 160 divisors (see below), whose sum is σ = 464914878120. Its totient is φ = 31616386560.

The previous prime is 128441612501. The next prime is 128441612581. The reversal of 128441612520 is 25216144821.

128441612520 is a `hidden beast` number, since 1 + 2 + 84 + 41 + 6 + 12 + 520 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 86474812356 + 41966800164 = 294066^2 + 204858^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1482591 + ... + 1566830.

Almost surely, 2^128441612520 is an apocalyptic number.

128441612520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128441612520 is an abundant number, since it is smaller than the sum of its proper divisors (336473265600).

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

128441612520 is a wasteful number, since it uses less digits than its factorization.

128441612520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049457 (or 3049444 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 128441612520 in words is "one hundred twenty-eight billion, four hundred forty-one million, six hundred twelve thousand, five hundred twenty".