64647652 has 24 divisors (see below), whose sum is σ = 121998240. Its totient is φ = 29874240.

The previous prime is 64647647. The next prime is 64647659. The reversal of 64647652 is 25674646.

It is a super-2 number, since 2×64647652² = 8358637818226208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64647659) 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, 7258 + ... + 13489.

It is an arithmetic number, because the mean of its divisors is an integer number (5083260).

Almost surely, 2^64647652 is an apocalyptic number.

It is an amenable number.

64647652 is a deficient number, since it is larger than the sum of its proper divisors (57350588).

64647652 is a wasteful number, since it uses less digits than its factorization.

64647652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20811 (or 20809 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

The square root of 64647652 is about 8040.3763593504. The cubic root of 64647652 is about 401.3447490587.

The spelling of 64647652 in words is "sixty-four million, six hundred forty-seven thousand, six hundred fifty-two".