64525015 has 4 divisors (see below), whose sum is σ = 77430024. Its totient is φ = 51620008.

The previous prime is 64524991. The next prime is 64525037. The reversal of 64525015 is 51052546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64525015 - 2¹¹ = 64522967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6452497 + ... + 6452506.

It is an arithmetic number, because the mean of its divisors is an integer number (19357506).

Almost surely, 2^64525015 is an apocalyptic number.

64525015 is a deficient number, since it is larger than the sum of its proper divisors (12905009).

64525015 is a wasteful number, since it uses less digits than its factorization.

64525015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905008.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 64525015 is about 8032.7464170108. The cubic root of 64525015 is about 401.0908039131.

The spelling of 64525015 in words is "sixty-four million, five hundred twenty-five thousand, fifteen".