64581325207 has 4 divisors (see below), whose sum is σ = 73807228816. Its totient is φ = 55355421600.

The previous prime is 64581325199. The next prime is 64581325217. The reversal of 64581325207 is 70252318546.

64581325207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64581325207 - 2³ = 64581325199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64581325217) 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, 4612951794 + ... + 4612951807.

It is an arithmetic number, because the mean of its divisors is an integer number (18451807204).

Almost surely, 2^64581325207 is an apocalyptic number.

64581325207 is a deficient number, since it is larger than the sum of its proper divisors (9225903609).

64581325207 is an equidigital number, since it uses as much as digits as its factorization.

64581325207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9225903608.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 64581325207 in words is "sixty-four billion, five hundred eighty-one million, three hundred twenty-five thousand, two hundred seven".