64633736 has 16 divisors (see below), whose sum is σ = 122366400. Its totient is φ = 32002704.

The previous prime is 64633693. The next prime is 64633739. The reversal of 64633736 is 63733646.

It is a self number, because there is not a number n which added to its sum of digits gives 64633736.

It is not an unprimeable number, because it can be changed into a prime (64633739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38396 + ... + 40043.

It is an arithmetic number, because the mean of its divisors is an integer number (7647900).

Almost surely, 2^64633736 is an apocalyptic number.

It is an amenable number.

64633736 is a deficient number, since it is larger than the sum of its proper divisors (57732664).

64633736 is a wasteful number, since it uses less digits than its factorization.

64633736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78548 (or 78544 counting only the distinct ones).

The product of its digits is 163296, while the sum is 38.

The square root of 64633736 is about 8039.5109303987. The cubic root of 64633736 is about 401.3159492794.

The spelling of 64633736 in words is "sixty-four million, six hundred thirty-three thousand, seven hundred thirty-six".