38279351857 has 4 divisors (see below), whose sum is σ = 38280312180. Its totient is φ = 38278391536.

The previous prime is 38279351833. The next prime is 38279351863. The reversal of 38279351857 is 75815397283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75815397283 = 23 ⋅3296321621.

It can be written as a sum of positive squares in 2 ways, for example, as 18823565601 + 19455786256 = 137199^2 + 139484^2 .

It is a cyclic number.

It is not a de Polignac number, because 38279351857 - 2¹¹ = 38279349809 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38279355857) 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, 417658 + ... + 500995.

It is an arithmetic number, because the mean of its divisors is an integer number (9570078045).

Almost surely, 2^38279351857 is an apocalyptic number.

It is an amenable number.

38279351857 is a deficient number, since it is larger than the sum of its proper divisors (960323).

38279351857 is an equidigital number, since it uses as much as digits as its factorization.

38279351857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960322.

The product of its digits is 12700800, while the sum is 58.

The spelling of 38279351857 in words is "thirty-eight billion, two hundred seventy-nine million, three hundred fifty-one thousand, eight hundred fifty-seven".