3838281855257 has 4 divisors (see below), whose sum is σ = 3970636402020. Its totient is φ = 3705927308496.

The previous prime is 3838281855167. The next prime is 3838281855259. The reversal of 3838281855257 is 7525581828383.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1370903772736 + 2467378082521 = 1170856^2 + 1570789^2 .

It is a cyclic number.

It is not a de Polignac number, because 3838281855257 - 2¹⁴ = 3838281838873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3838281855193 and 3838281855202.

It is not an unprimeable number, because it can be changed into a prime (3838281855259) 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, 66177273338 + ... + 66177273395.

It is an arithmetic number, because the mean of its divisors is an integer number (992659100505).

Almost surely, 2^{3838281855257} is an apocalyptic number.

It is an amenable number.

3838281855257 is a deficient number, since it is larger than the sum of its proper divisors (132354546763).

3838281855257 is a wasteful number, since it uses less digits than its factorization.

3838281855257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132354546762.

The product of its digits is 129024000, while the sum is 65.

The spelling of 3838281855257 in words is "three trillion, eight hundred thirty-eight billion, two hundred eighty-one million, eight hundred fifty-five thousand, two hundred fifty-seven".