1064564644 has 48 divisors (see below), whose sum is σ = 2210475456. Its totient is φ = 442224000.

The previous prime is 1064564609. The next prime is 1064564653. The reversal of 1064564644 is 4464654601.

It is a super-2 number, since 2×1064564644² = 2266595762509693472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1064564597 and 1064564606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48559 + ... + 66985.

It is an arithmetic number, because the mean of its divisors is an integer number (46051572).

Almost surely, 2^1064564644 is an apocalyptic number.

It is an amenable number.

1064564644 is an abundant number, since it is smaller than the sum of its proper divisors (1145910812).

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

1064564644 is a wasteful number, since it uses less digits than its factorization.

1064564644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18556 (or 18554 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 1064564644 is about 32627.6668488570. Note that the first 3 decimals coincide. The cubic root of 1064564644 is about 1021.0743019156.

The spelling of 1064564644 in words is "one billion, sixty-four million, five hundred sixty-four thousand, six hundred forty-four".