36451881 has 6 divisors (see below), whose sum is σ = 52652730. Its totient is φ = 24301248.

The previous prime is 36451873. The next prime is 36451901. The reversal of 36451881 is 18815463.

36451881 is a `hidden beast` number, since 3 + 64 + 518 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21706281 + 14745600 = 4659^2 + 3840^2 .

It is not a de Polignac number, because 36451881 - 2³ = 36451873 is a prime.

It is a super-2 number, since 2×36451881² = 2657479256876322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36451801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2025096 + ... + 2025113.

It is an arithmetic number, because the mean of its divisors is an integer number (8775455).

Almost surely, 2^36451881 is an apocalyptic number.

It is an amenable number.

36451881 is a deficient number, since it is larger than the sum of its proper divisors (16200849).

36451881 is a wasteful number, since it uses less digits than its factorization.

36451881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050215 (or 4050212 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 36451881 is about 6037.5393166422. The cubic root of 36451881 is about 331.5685382061.

The spelling of 36451881 in words is "thirty-six million, four hundred fifty-one thousand, eight hundred eighty-one".