64529015 has 4 divisors (see below), whose sum is σ = 77434824. Its totient is φ = 51623208.

The previous prime is 64528987. The next prime is 64529021. The reversal of 64529015 is 51092546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51092546 = 2 ⋅25546273.

It is a cyclic number.

It is not a de Polignac number, because 64529015 - 2⁸ = 64528759 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, 6452897 + ... + 6452906.

It is an arithmetic number, because the mean of its divisors is an integer number (19358706).

Almost surely, 2^64529015 is an apocalyptic number.

64529015 is a deficient number, since it is larger than the sum of its proper divisors (12905809).

64529015 is a wasteful number, since it uses less digits than its factorization.

64529015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905808.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 64529015 is about 8032.9953939984. The cubic root of 64529015 is about 401.0990918103.

The spelling of 64529015 in words is "sixty-four million, five hundred twenty-nine thousand, fifteen".