36409538421 has 16 divisors (see below), whose sum is σ = 54297281920. Its totient is φ = 24112274400.

The previous prime is 36409538413. The next prime is 36409538437. The reversal of 36409538421 is 12483590463.

36409538421 is a `hidden beast` number, since 36 + 40 + 9 + 538 + 42 + 1 = 666.

It is not a de Polignac number, because 36409538421 - 2³ = 36409538413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36409538441) 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, 4461160 + ... + 4469313.

It is an arithmetic number, because the mean of its divisors is an integer number (3393580120).

Almost surely, 2^36409538421 is an apocalyptic number.

It is an amenable number.

36409538421 is a deficient number, since it is larger than the sum of its proper divisors (17887743499).

36409538421 is a wasteful number, since it uses less digits than its factorization.

36409538421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930633 (or 8930627 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 36409538421 in words is "thirty-six billion, four hundred nine million, five hundred thirty-eight thousand, four hundred twenty-one".