64610644 has 12 divisors (see below), whose sum is σ = 129221344. Its totient is φ = 27690264.

The previous prime is 64610627. The next prime is 64610653. The reversal of 64610644 is 44601646.

64610644 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153734 + ... + 1153789.

Almost surely, 2^64610644 is an apocalyptic number.

It is an amenable number.

64610644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64610644 is a wasteful number, since it uses less digits than its factorization.

64610644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307534 (or 2307532 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64610644 is about 8038.0746450876. The cubic root of 64610644 is about 401.2681502386.

The spelling of 64610644 in words is "sixty-four million, six hundred ten thousand, six hundred forty-four".