64744536 has 16 divisors (see below), whose sum is σ = 161861400. Its totient is φ = 21581504.

The previous prime is 64744507. The next prime is 64744553. The reversal of 64744536 is 63544746.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64744494 and 64744503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348821 + ... + 1348868.

Almost surely, 2^64744536 is an apocalyptic number.

It is an amenable number.

64744536 is an abundant number, since it is smaller than the sum of its proper divisors (97116864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64744536 is a wasteful number, since it uses less digits than its factorization.

64744536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697698 (or 2697694 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 64744536 is about 8046.3989461125. The cubic root of 64744536 is about 401.5451403347.

The spelling of 64744536 in words is "sixty-four million, seven hundred forty-four thousand, five hundred thirty-six".