53664646 has 16 divisors (see below), whose sum is σ = 93106944. Its totient is φ = 22721544.

The previous prime is 53664623. The next prime is 53664649. The reversal of 53664646 is 64646635.

It is a junction number, because it is equal to n+sod(n) for n = 53664599 and 53664608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53664649) 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, 21930 + ... + 24253.

It is an arithmetic number, because the mean of its divisors is an integer number (5819184).

Almost surely, 2^53664646 is an apocalyptic number.

53664646 is a deficient number, since it is larger than the sum of its proper divisors (39442298).

53664646 is a wasteful number, since it uses less digits than its factorization.

53664646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46275.

The product of its digits is 311040, while the sum is 40.

The square root of 53664646 is about 7325.6157420383. The cubic root of 53664646 is about 377.1922459944.

The spelling of 53664646 in words is "fifty-three million, six hundred sixty-four thousand, six hundred forty-six".