64987695 has 48 divisors (see below), whose sum is σ = 122709600. Its totient is φ = 31691520.

The previous prime is 64987679. The next prime is 64987721. The reversal of 64987695 is 59678946.

It is not a de Polignac number, because 64987695 - 2⁴ = 64987679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23485 + ... + 26105.

It is an arithmetic number, because the mean of its divisors is an integer number (2556450).

Almost surely, 2^64987695 is an apocalyptic number.

64987695 is a deficient number, since it is larger than the sum of its proper divisors (57721905).

64987695 is a wasteful number, since it uses less digits than its factorization.

64987695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680 (or 2677 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 64987695 is about 8061.4945884743. The cubic root of 64987695 is about 402.0472024472.

The spelling of 64987695 in words is "sixty-four million, nine hundred eighty-seven thousand, six hundred ninety-five".