64520265 has 16 divisors (see below), whose sum is σ = 105751296. Its totient is φ = 33571200.

The previous prime is 64520231. The next prime is 64520293. The reversal of 64520265 is 56202546.

It is not a de Polignac number, because 64520265 - 2⁸ = 64520009 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, 51841 + ... + 53070.

It is an arithmetic number, because the mean of its divisors is an integer number (6609456).

Almost surely, 2^64520265 is an apocalyptic number.

It is an amenable number.

64520265 is a deficient number, since it is larger than the sum of its proper divisors (41231031).

64520265 is a wasteful number, since it uses less digits than its factorization.

64520265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104960.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 64520265 is about 8032.4507468144. The cubic root of 64520265 is about 401.0809615904.

It can be divided in two parts, 645 and 20265, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 64520265 in words is "sixty-four million, five hundred twenty thousand, two hundred sixty-five".