36651881 has 16 divisors (see below), whose sum is σ = 45023616. Its totient is φ = 29120256.

The previous prime is 36651877. The next prime is 36651899. The reversal of 36651881 is 18815663.

It is a happy number.

36651881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 36651881 - 2² = 36651877 is a prime.

It is a super-2 number, since 2×36651881² = 2686720761676322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36651821) 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 15 ways as a sum of consecutive naturals, for example, 5675 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (2813976).

Almost surely, 2^36651881 is an apocalyptic number.

It is an amenable number.

36651881 is a deficient number, since it is larger than the sum of its proper divisors (8371735).

36651881 is a wasteful number, since it uses less digits than its factorization.

36651881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688.

The product of its digits is 34560, while the sum is 38.

The square root of 36651881 is about 6054.0796988477. The cubic root of 36651881 is about 332.1738366008.

The spelling of 36651881 in words is "thirty-six million, six hundred fifty-one thousand, eight hundred eighty-one".