128325663852815 has 32 divisors (see below), whose sum is σ = 181565377713216. Its totient is φ = 85837691151360.

The previous prime is 128325663852791. The next prime is 128325663852829. The reversal of 128325663852815 is 518258366523821.

It is not a de Polignac number, because 128325663852815 - 2²⁰ = 128325662804239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323766662 + ... + 324162771.

It is an arithmetic number, because the mean of its divisors is an integer number (5673918053538).

Almost surely, 2^{128325663852815} is an apocalyptic number.

128325663852815 is a deficient number, since it is larger than the sum of its proper divisors (53239713860401).

128325663852815 is a wasteful number, since it uses less digits than its factorization.

128325663852815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647929739.

The product of its digits is 165888000, while the sum is 65.

The spelling of 128325663852815 in words is "one hundred twenty-eight trillion, three hundred twenty-five billion, six hundred sixty-three million, eight hundred fifty-two thousand, eight hundred fifteen".