36801573721 has 4 divisors (see below), whose sum is σ = 40147171344. Its totient is φ = 33455976100.

The previous prime is 36801573713. The next prime is 36801573751. The reversal of 36801573721 is 12737510863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36801573721 - 2³ = 36801573713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36801573751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672798795 + ... + 1672798816.

It is an arithmetic number, because the mean of its divisors is an integer number (10036792836).

Almost surely, 2^36801573721 is an apocalyptic number.

It is an amenable number.

36801573721 is a deficient number, since it is larger than the sum of its proper divisors (3345597623).

36801573721 is a wasteful number, since it uses less digits than its factorization.

36801573721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345597622.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 36801573721 in words is "thirty-six billion, eight hundred one million, five hundred seventy-three thousand, seven hundred twenty-one".