1016644563 has 12 divisors (see below), whose sum is σ = 1601985528. Its totient is φ = 616148160.

The previous prime is 1016644553. The next prime is 1016644567. The reversal of 1016644563 is 3654466101.

It is a happy number.

1016644563 is a `hidden beast` number, since 1 + 0 + 1 + 6 + 644 + 5 + 6 + 3 = 666.

It is not a de Polignac number, because 1016644563 - 2⁴ = 1016644547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1016644567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5134470 + ... + 5134667.

It is an arithmetic number, because the mean of its divisors is an integer number (133498794).

Almost surely, 2^1016644563 is an apocalyptic number.

1016644563 is a deficient number, since it is larger than the sum of its proper divisors (585340965).

1016644563 is a wasteful number, since it uses less digits than its factorization.

1016644563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10269154 (or 10269151 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1016644563 is about 31884.8641678148. The cubic root of 1016644563 is about 1005.5176868039.

The spelling of 1016644563 in words is "one billion, sixteen million, six hundred forty-four thousand, five hundred sixty-three".