64884408725 has 18 divisors (see below), whose sum is σ = 85467818214. Its totient is φ = 48854137600.

The previous prime is 64884408713. The next prime is 64884408749. The reversal of 64884408725 is 52780448846.

64884408725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 217444516 + 64666964209 = 14746^2 + 254297^2 .

It is not a de Polignac number, because 64884408725 - 2¹⁸ = 64884146581 is a prime.

It is a super-2 number, since 2×64884408725² (a number of 22 digits) contains 22 as substring.

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 17 ways as a sum of consecutive naturals, for example, 4483046 + ... + 4497495.

It is an arithmetic number, because the mean of its divisors is an integer number (4748212123).

Almost surely, 2^64884408725 is an apocalyptic number.

It is an amenable number.

64884408725 is a deficient number, since it is larger than the sum of its proper divisors (20583409489).

64884408725 is a wasteful number, since it uses less digits than its factorization.

64884408725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8980585 (or 8980563 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 56.

The spelling of 64884408725 in words is "sixty-four billion, eight hundred eighty-four million, four hundred eight thousand, seven hundred twenty-five".