64512646 has 16 divisors (see below), whose sum is σ = 109207440. Its totient is φ = 28312480.

The previous prime is 64512611. The next prime is 64512647. The reversal of 64512646 is 64621546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64512647) 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, 49921 + ... + 51196.

It is an arithmetic number, because the mean of its divisors is an integer number (6825465).

Almost surely, 2^64512646 is an apocalyptic number.

64512646 is a deficient number, since it is larger than the sum of its proper divisors (44694794).

64512646 is a wasteful number, since it uses less digits than its factorization.

64512646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101159.

The product of its digits is 34560, while the sum is 34.

The square root of 64512646 is about 8031.9764690890. The cubic root of 64512646 is about 401.0651734958.

Subtracting 64512646 from its reverse (64621546), we obtain a square (108900 = 330²).

The spelling of 64512646 in words is "sixty-four million, five hundred twelve thousand, six hundred forty-six".