64805475 has 24 divisors (see below), whose sum is σ = 122452480. Its totient is φ = 29625120.

The previous prime is 64805471. The next prime is 64805509. The reversal of 64805475 is 57450846.

It is not a de Polignac number, because 64805475 - 2² = 64805471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64805471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61195 + ... + 62244.

Almost surely, 2^64805475 is an apocalyptic number.

64805475 is a deficient number, since it is larger than the sum of its proper divisors (57647005).

64805475 is a wasteful number, since it uses less digits than its factorization.

64805475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123459 (or 123454 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 64805475 is about 8050.1847804880. The cubic root of 64805475 is about 401.6710819079.

The spelling of 64805475 in words is "sixty-four million, eight hundred five thousand, four hundred seventy-five".