38406055521 has 8 divisors (see below), whose sum is σ = 52174264320. Its totient is φ = 25120941872.

The previous prime is 38406055507. The next prime is 38406055543. The reversal of 38406055521 is 12555060483.

38406055521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38406055521 - 2¹¹ = 38406053473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38406055521.

It is not an unprimeable number, because it can be changed into a prime (38406055591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120773601 + ... + 120773918.

It is an arithmetic number, because the mean of its divisors is an integer number (6521783040).

Almost surely, 2^38406055521 is an apocalyptic number.

It is an amenable number.

38406055521 is a deficient number, since it is larger than the sum of its proper divisors (13768208799).

38406055521 is a wasteful number, since it uses less digits than its factorization.

38406055521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241547575.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 38406055521 in words is "thirty-eight billion, four hundred six million, fifty-five thousand, five hundred twenty-one".