64504727 has 24 divisors (see below), whose sum is σ = 78807744. Its totient is φ = 52581312.

The previous prime is 64504723. The next prime is 64504747. The reversal of 64504727 is 72740546.

It is not a de Polignac number, because 64504727 - 2² = 64504723 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 (64504721) 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, 84833 + ... + 85589.

It is an arithmetic number, because the mean of its divisors is an integer number (3283656).

Almost surely, 2^64504727 is an apocalyptic number.

64504727 is a deficient number, since it is larger than the sum of its proper divisors (14303017).

64504727 is a wasteful number, since it uses less digits than its factorization.

64504727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 64504727 is about 8031.4834868784. The cubic root of 64504727 is about 401.0487624236.

The spelling of 64504727 in words is "sixty-four million, five hundred four thousand, seven hundred twenty-seven".