3838705862521 has 16 divisors (see below), whose sum is σ = 4081343313600. Its totient is φ = 3600276691968.

The previous prime is 3838705862513. The next prime is 3838705862557. The reversal of 3838705862521 is 1252685078383.

It is a cyclic number.

It is not a de Polignac number, because 3838705862521 - 2³ = 3838705862513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3838705862921) 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, 1126516 + ... + 2991061.

It is an arithmetic number, because the mean of its divisors is an integer number (255083957100).

Almost surely, 2^{3838705862521} is an apocalyptic number.

It is an amenable number.

3838705862521 is a deficient number, since it is larger than the sum of its proper divisors (242637451079).

3838705862521 is a wasteful number, since it uses less digits than its factorization.

3838705862521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118088.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 3838705862521 in words is "three trillion, eight hundred thirty-eight billion, seven hundred five million, eight hundred sixty-two thousand, five hundred twenty-one".