64505501 has 16 divisors (see below), whose sum is σ = 69079296. Its totient is φ = 60103296.

The previous prime is 64505489. The next prime is 64505503. The reversal of 64505501 is 10550546.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64505501 is a prime.

It is a super-2 number, since 2×64505501² = 8321919318522002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172751 + ... + 173123.

It is an arithmetic number, because the mean of its divisors is an integer number (4317456).

Almost surely, 2^64505501 is an apocalyptic number.

It is an amenable number.

64505501 is a deficient number, since it is larger than the sum of its proper divisors (4573795).

64505501 is a wasteful number, since it uses less digits than its factorization.

64505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 64505501 is about 8031.5316721034. The cubic root of 64505501 is about 401.0503664947.

The spelling of 64505501 in words is "sixty-four million, five hundred five thousand, five hundred one".