64615087 has 4 divisors (see below), whose sum is σ = 64643040. Its totient is φ = 64587136.

The previous prime is 64615063. The next prime is 64615151. The reversal of 64615087 is 78051646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78051646 = 2 ⋅39025823.

It is a cyclic number.

It is not a de Polignac number, because 64615087 - 2²³ = 56226479 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 (64615007) 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, 10162 + ... + 15247.

It is an arithmetic number, because the mean of its divisors is an integer number (16160760).

Almost surely, 2^64615087 is an apocalyptic number.

64615087 is a deficient number, since it is larger than the sum of its proper divisors (27953).

64615087 is a wasteful number, since it uses less digits than its factorization.

64615087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27952.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 64615087 is about 8038.3510124901. The cubic root of 64615087 is about 401.2773478641.

The spelling of 64615087 in words is "sixty-four million, six hundred fifteen thousand, eighty-seven".