64645946 has 16 divisors (see below), whose sum is σ = 99144000. Its totient is φ = 31603968.

The previous prime is 64645927. The next prime is 64645957. The reversal of 64645946 is 64954646.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64645897 and 64645906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22106 + ... + 24858.

It is an arithmetic number, because the mean of its divisors is an integer number (6196500).

Almost surely, 2^64645946 is an apocalyptic number.

64645946 is a deficient number, since it is larger than the sum of its proper divisors (34498054).

64645946 is a wasteful number, since it uses less digits than its factorization.

64645946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013.

The product of its digits is 622080, while the sum is 44.

The square root of 64645946 is about 8040.2702690892. The cubic root of 64645946 is about 401.3412186383.

The spelling of 64645946 in words is "sixty-four million, six hundred forty-five thousand, nine hundred forty-six".