64115687 has 8 divisors (see below), whose sum is σ = 67961232. Its totient is φ = 60278400.

The previous prime is 64115683. The next prime is 64115707. The reversal of 64115687 is 78651146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64115687 - 2² = 64115683 is a prime.

It is a super-2 number, since 2×64115687² = 8221642638963938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64115687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22112 + ... + 24842.

It is an arithmetic number, because the mean of its divisors is an integer number (8495154).

Almost surely, 2^64115687 is an apocalyptic number.

64115687 is a deficient number, since it is larger than the sum of its proper divisors (3845545).

64115687 is a wasteful number, since it uses less digits than its factorization.

64115687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129.

The product of its digits is 40320, while the sum is 38.

The square root of 64115687 is about 8007.2271729982. The cubic root of 64115687 is about 400.2408695089.

The spelling of 64115687 in words is "sixty-four million, one hundred fifteen thousand, six hundred eighty-seven".