731866562064 has 135 divisors (see below), whose sum is σ = 2251685574957. Its totient is φ = 221743526400.

The previous prime is 731866562057. The next prime is 731866562099. The reversal of 731866562064 is 460265668137.

The square root of 731866562064 is 855492.

It is a perfect power (a square), and thus also a powerful number.

731866562064 is a `hidden beast` number, since 7 + 3 + 1 + 8 + 6 + 6 + 5 + 620 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 695736155664 + 36130406400 = 834108^2 + 190080^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 731866562064.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 112921704 + ... + 112928184.

Almost surely, 2^731866562064 is an apocalyptic number.

731866562064 is the 855492-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731866562064

731866562064 is an abundant number, since it is smaller than the sum of its proper divisors (1519819012893).

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

731866562064 is an equidigital number, since it uses as much as digits as its factorization.

731866562064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998 (or 6497 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 731866562064 in words is "seven hundred thirty-one billion, eight hundred sixty-six million, five hundred sixty-two thousand, sixty-four".