916563639 has 32 divisors (see below), whose sum is σ = 1326809088. Its totient is φ = 561132000.

The previous prime is 916563623. The next prime is 916563649. The reversal of 916563639 is 936365619.

It is not a de Polignac number, because 916563639 - 2⁴ = 916563623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916563649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278574 + ... + 281844.

It is an arithmetic number, because the mean of its divisors is an integer number (41462784).

Almost surely, 2^916563639 is an apocalyptic number.

916563639 is a deficient number, since it is larger than the sum of its proper divisors (410245449).

916563639 is a wasteful number, since it uses less digits than its factorization.

916563639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459.

The product of its digits is 787320, while the sum is 48.

The square root of 916563639 is about 30274.8020472471. The cubic root of 916563639 is about 971.3763855812.

The spelling of 916563639 in words is "nine hundred sixteen million, five hundred sixty-three thousand, six hundred thirty-nine".