64815734 has 4 divisors (see below), whose sum is σ = 97223604. Its totient is φ = 32407866.

The previous prime is 64815731. The next prime is 64815743. The reversal of 64815734 is 43751846.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64815731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16203932 + ... + 16203935.

It is an arithmetic number, because the mean of its divisors is an integer number (24305901).

Almost surely, 2^64815734 is an apocalyptic number.

64815734 is a deficient number, since it is larger than the sum of its proper divisors (32407870).

64815734 is a wasteful number, since it uses less digits than its factorization.

64815734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32407869.

The product of its digits is 80640, while the sum is 38.

The square root of 64815734 is about 8050.8219456152. The cubic root of 64815734 is about 401.6922762396.

The spelling of 64815734 in words is "sixty-four million, eight hundred fifteen thousand, seven hundred thirty-four".