128324378707 has 4 divisors (see below), whose sum is σ = 146656432816. Its totient is φ = 109992324600.

The previous prime is 128324378659. The next prime is 128324378719. The reversal of 128324378707 is 707873423821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 707873423821 = 43 ⋅16462172647.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128324378707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128324378107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166027044 + ... + 9166027057.

It is an arithmetic number, because the mean of its divisors is an integer number (36664108204).

Almost surely, 2^128324378707 is an apocalyptic number.

128324378707 is a deficient number, since it is larger than the sum of its proper divisors (18332054109).

128324378707 is an equidigital number, since it uses as much as digits as its factorization.

128324378707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18332054108.

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 128324378707 in words is "one hundred twenty-eight billion, three hundred twenty-four million, three hundred seventy-eight thousand, seven hundred seven".