128663447593240 has 96 divisors (see below), whose sum is σ = 356566109058720. Its totient is φ = 41518288960512.

The previous prime is 128663447593193. The next prime is 128663447593267. The reversal of 128663447593240 is 42395744366821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1930690684 + ... + 1930757323.

It is an arithmetic number, because the mean of its divisors is an integer number (3714230302695).

It is a 2-persistent number, because it is pandigital, and so is 2⋅128663447593240 = 257326895186480, but 3⋅128663447593240 = 385990342779720 is not.

Almost surely, 2^{128663447593240} is an apocalyptic number.

128663447593240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128663447593240 is an abundant number, since it is smaller than the sum of its proper divisors (227902661465480).

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

128663447593240 is a wasteful number, since it uses less digits than its factorization.

128663447593240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861448049 (or 3861448038 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 64.

The spelling of 128663447593240 in words is "one hundred twenty-eight trillion, six hundred sixty-three billion, four hundred forty-seven million, five hundred ninety-three thousand, two hundred forty".