64681415 has 8 divisors (see below), whose sum is σ = 81702960. Its totient is φ = 49021632.

The previous prime is 64681403. The next prime is 64681427. The reversal of 64681415 is 51418646.

It is an interprime number because it is at equal distance from previous prime (64681403) and next prime (64681427).

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 64681415 - 2¹⁴ = 64665031 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340334 + ... + 340523.

It is an arithmetic number, because the mean of its divisors is an integer number (10212870).

Almost surely, 2^64681415 is an apocalyptic number.

64681415 is a deficient number, since it is larger than the sum of its proper divisors (17021545).

64681415 is a wasteful number, since it uses less digits than its factorization.

64681415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680881.

The product of its digits is 23040, while the sum is 35.

The square root of 64681415 is about 8042.4756760590. The cubic root of 64681415 is about 401.4146059112.

The spelling of 64681415 in words is "sixty-four million, six hundred eighty-one thousand, four hundred fifteen".