38407135536221 has 4 divisors (see below), whose sum is σ = 39058103935200. Its totient is φ = 37756167137244.

The previous prime is 38407135536199. The next prime is 38407135536227. The reversal of 38407135536221 is 12263553170483.

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 38407135536221 - 2⁶ = 38407135536157 is a prime.

It is a super-2 number, since 2×38407135536221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38407135536221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38407135536227) 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, 325484199401 + ... + 325484199518.

It is an arithmetic number, because the mean of its divisors is an integer number (9764525983800).

Almost surely, 2^{38407135536221} is an apocalyptic number.

It is an amenable number.

38407135536221 is a deficient number, since it is larger than the sum of its proper divisors (650968398979).

38407135536221 is an equidigital number, since it uses as much as digits as its factorization.

38407135536221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650968398978.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 38407135536221 in words is "thirty-eight trillion, four hundred seven billion, one hundred thirty-five million, five hundred thirty-six thousand, two hundred twenty-one".