64576505 has 16 divisors (see below), whose sum is σ = 89379840. Its totient is φ = 43872192.

The previous prime is 64576493. The next prime is 64576511. The reversal of 64576505 is 50567546.

It is not a de Polignac number, because 64576505 - 2¹⁸ = 64314361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4649 + ... + 12278.

It is an arithmetic number, because the mean of its divisors is an integer number (5586240).

Almost surely, 2^64576505 is an apocalyptic number.

It is an amenable number.

64576505 is a deficient number, since it is larger than the sum of its proper divisors (24803335).

64576505 is a wasteful number, since it uses less digits than its factorization.

64576505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17048.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 64576505 is about 8035.9507838214. The cubic root of 64576505 is about 401.1974637078.

The spelling of 64576505 in words is "sixty-four million, five hundred seventy-six thousand, five hundred five".