38573636382721 has 4 divisors (see below), whose sum is σ = 42080330599344. Its totient is φ = 35066942166100.

The previous prime is 38573636382713. The next prime is 38573636382737. The reversal of 38573636382721 is 12728363637583.

It is a happy number.

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 38573636382721 - 2³ = 38573636382713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38573636382121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753347108295 + ... + 1753347108316.

It is an arithmetic number, because the mean of its divisors is an integer number (10520082649836).

Almost surely, 2^{38573636382721} is an apocalyptic number.

It is an amenable number.

38573636382721 is a deficient number, since it is larger than the sum of its proper divisors (3506694216623).

38573636382721 is a wasteful number, since it uses less digits than its factorization.

38573636382721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506694216622.

The product of its digits is 182891520, while the sum is 64.

The spelling of 38573636382721 in words is "thirty-eight trillion, five hundred seventy-three billion, six hundred thirty-six million, three hundred eighty-two thousand, seven hundred twenty-one".