128640314470688 has 24 divisors (see below), whose sum is σ = 253276994344752. Its totient is φ = 64315998446656.

The previous prime is 128640314470627. The next prime is 128640314470699. The reversal of 128640314470688 is 886074413046821.

It is a happy number.

It is a super-2 number, since 2×128640314470688² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128640314470688.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129459470 + ... + 130449357.

It is an arithmetic number, because the mean of its divisors is an integer number (10553208097698).

Almost surely, 2^{128640314470688} is an apocalyptic number.

It is an amenable number.

128640314470688 is a deficient number, since it is larger than the sum of its proper divisors (124636679874064).

128640314470688 is a wasteful number, since it uses less digits than its factorization.

128640314470688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259924304 (or 259924296 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 62.

The spelling of 128640314470688 in words is "one hundred twenty-eight trillion, six hundred forty billion, three hundred fourteen million, four hundred seventy thousand, six hundred eighty-eight".