64532015 has 4 divisors (see below), whose sum is σ = 77438424. Its totient is φ = 51625608.

The previous prime is 64532011. The next prime is 64532023. The reversal of 64532015 is 51023546.

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 64532015 - 2² = 64532011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64532011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453197 + ... + 6453206.

It is an arithmetic number, because the mean of its divisors is an integer number (19359606).

Almost surely, 2^64532015 is an apocalyptic number.

64532015 is a deficient number, since it is larger than the sum of its proper divisors (12906409).

64532015 is a wasteful number, since it uses less digits than its factorization.

64532015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906408.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 64532015 is about 8033.1821216751. The cubic root of 64532015 is about 401.1053075084.

The spelling of 64532015 in words is "sixty-four million, five hundred thirty-two thousand, fifteen".