64545505 has 16 divisors (see below), whose sum is σ = 79030224. Its totient is φ = 50595840.

The previous prime is 64545497. The next prime is 64545511. The reversal of 64545505 is 50554546.

It can be written as a sum of positive squares in 8 ways, for example, as 817216 + 63728289 = 904^2 + 7983^2 .

It is not a de Polignac number, because 64545505 - 2³ = 64545497 is a prime.

It is a super-2 number, since 2×64545505² = 8332244431410050, which contains 22 as substring.

It is a Duffinian number.

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, 65577 + ... + 66553.

It is an arithmetic number, because the mean of its divisors is an integer number (4939389).

Almost surely, 2^64545505 is an apocalyptic number.

It is an amenable number.

64545505 is a deficient number, since it is larger than the sum of its proper divisors (14484719).

64545505 is a wasteful number, since it uses less digits than its factorization.

64545505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 64545505 is about 8034.0217201598. The cubic root of 64545505 is about 401.1332550504.

The spelling of 64545505 in words is "sixty-four million, five hundred forty-five thousand, five hundred five".