64648475 has 12 divisors (see below), whose sum is σ = 80296944. Its totient is φ = 51633120.

The previous prime is 64648447. The next prime is 64648481. The reversal of 64648475 is 57484646.

It is not a de Polignac number, because 64648475 - 2⁸ = 64648219 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16397 + ... + 19953.

It is an arithmetic number, because the mean of its divisors is an integer number (6691412).

Almost surely, 2^64648475 is an apocalyptic number.

64648475 is a deficient number, since it is larger than the sum of its proper divisors (15648469).

64648475 is a wasteful number, since it uses less digits than its factorization.

64648475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294 (or 4289 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 64648475 is about 8040.4275383838. The cubic root of 64648475 is about 401.3464521643.

The spelling of 64648475 in words is "sixty-four million, six hundred forty-eight thousand, four hundred seventy-five".