64442534 has 16 divisors (see below), whose sum is σ = 104769168. Its totient is φ = 29551392.

The previous prime is 64442533. The next prime is 64442537. The reversal of 64442534 is 43524446.

It is a self number, because there is not a number n which added to its sum of digits gives 64442534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64442533) 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, 3812 + ... + 11975.

It is an arithmetic number, because the mean of its divisors is an integer number (6548073).

Almost surely, 2^64442534 is an apocalyptic number.

64442534 is a deficient number, since it is larger than the sum of its proper divisors (40326634).

64442534 is a wasteful number, since it uses less digits than its factorization.

64442534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15959.

The product of its digits is 46080, while the sum is 32.

The square root of 64442534 is about 8027.6107279813. The cubic root of 64442534 is about 400.9198289985.

The spelling of 64442534 in words is "sixty-four million, four hundred forty-two thousand, five hundred thirty-four".