36613578881 has 6 divisors (see below), whose sum is σ = 40244677746. Its totient is φ = 33285071600.

The previous prime is 36613578857. The next prime is 36613578893. The reversal of 36613578881 is 18887531663.

It can be written as a sum of positive squares in only one way, i.e., 35510010481 + 1103568400 = 188441^2 + 33220^2 .

It is not a de Polignac number, because 36613578881 - 2²⁶ = 36546470017 is a prime.

It is a super-2 number, since 2×36613578881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36613598881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151295660 + ... + 151295901.

It is an arithmetic number, because the mean of its divisors is an integer number (6707446291).

Almost surely, 2^36613578881 is an apocalyptic number.

It is an amenable number.

36613578881 is a deficient number, since it is larger than the sum of its proper divisors (3631098865).

36613578881 is a wasteful number, since it uses less digits than its factorization.

36613578881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302591583 (or 302591572 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The spelling of 36613578881 in words is "thirty-six billion, six hundred thirteen million, five hundred seventy-eight thousand, eight hundred eighty-one".