64536773 has 12 divisors (see below), whose sum is σ = 75262572. Its totient is φ = 55177920.

The previous prime is 64536763. The next prime is 64536779. The reversal of 64536773 is 37763546.

It can be written as a sum of positive squares in 2 ways, for example, as 32069569 + 32467204 = 5663^2 + 5698^2 .

It is not a de Polignac number, because 64536773 - 2¹⁸ = 64274629 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64536773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64536779) 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, 21161 + ... + 24017.

It is an arithmetic number, because the mean of its divisors is an integer number (6271881).

Almost surely, 2^64536773 is an apocalyptic number.

It is an amenable number.

64536773 is a deficient number, since it is larger than the sum of its proper divisors (10725799).

64536773 is a wasteful number, since it uses less digits than its factorization.

64536773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3325 counting only the distinct ones).

The product of its digits is 317520, while the sum is 41.

The square root of 64536773 is about 8033.4782628697. The cubic root of 64536773 is about 401.1151652105.

The spelling of 64536773 in words is "sixty-four million, five hundred thirty-six thousand, seven hundred seventy-three".