128662668847264 has 48 divisors (see below), whose sum is σ = 256245180163560. Its totient is φ = 63585060802560.

The previous prime is 128662668847231. The next prime is 128662668847309. The reversal of 128662668847264 is 462748866266821.

It can be written as a sum of positive squares in 4 ways, for example, as 93294194667664 + 35368474179600 = 9658892^2 + 5947140^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599307 + ... + 16052554.

Almost surely, 2^{128662668847264} is an apocalyptic number.

It is an amenable number.

128662668847264 is a deficient number, since it is larger than the sum of its proper divisors (127582511316296).

128662668847264 is a wasteful number, since it uses less digits than its factorization.

128662668847264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16654673 (or 16654665 counting only the distinct ones).

The product of its digits is 3567255552, while the sum is 76.

The spelling of 128662668847264 in words is "one hundred twenty-eight trillion, six hundred sixty-two billion, six hundred sixty-eight million, eight hundred forty-seven thousand, two hundred sixty-four".