36663280581 has 16 divisors (see below), whose sum is σ = 49666972608. Its totient is φ = 24051667200.

The previous prime is 36663280573. The next prime is 36663280627. The reversal of 36663280581 is 18508236663.

It is not a de Polignac number, because 36663280581 - 2³ = 36663280573 is a prime.

It is a super-2 number, since 2×36663280581² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 36663280581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36663280781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92221 + ... + 286061.

It is an arithmetic number, because the mean of its divisors is an integer number (3104185788).

Almost surely, 2^36663280581 is an apocalyptic number.

It is an amenable number.

36663280581 is a deficient number, since it is larger than the sum of its proper divisors (13003692027).

36663280581 is a wasteful number, since it uses less digits than its factorization.

36663280581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194852.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 36663280581 in words is "thirty-six billion, six hundred sixty-three million, two hundred eighty thousand, five hundred eighty-one".