64967644 has 24 divisors (see below), whose sum is σ = 131227488. Its totient is φ = 27566400.

The previous prime is 64967641. The next prime is 64967681. The reversal of 64967644 is 44676946.

It is a junction number, because it is equal to n+sod(n) for n = 64967594 and 64967603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64967641) 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, 8659 + ... + 14314.

It is an arithmetic number, because the mean of its divisors is an integer number (5467812).

Almost surely, 2^64967644 is an apocalyptic number.

It is an amenable number.

64967644 is an abundant number, since it is smaller than the sum of its proper divisors (66259844).

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

64967644 is a wasteful number, since it uses less digits than its factorization.

64967644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23085 (or 23083 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 64967644 is about 8060.2508645823. The cubic root of 64967644 is about 402.0058496051.

The spelling of 64967644 in words is "sixty-four million, nine hundred sixty-seven thousand, six hundred forty-four".