38358825781 has 4 divisors (see below), whose sum is σ = 38519323200. Its totient is φ = 38198328364.

The previous prime is 38358825779. The next prime is 38358825821. The reversal of 38358825781 is 18752885383.

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 38358825781 - 2¹ = 38358825779 is a prime.

It is a super-2 number, since 2×38358825781² (a number of 22 digits) contains 22 as substring.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38358825761) 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, 80248351 + ... + 80248828.

It is an arithmetic number, because the mean of its divisors is an integer number (9629830800).

Almost surely, 2^38358825781 is an apocalyptic number.

It is an amenable number.

38358825781 is a deficient number, since it is larger than the sum of its proper divisors (160497419).

38358825781 is a wasteful number, since it uses less digits than its factorization.

38358825781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160497418.

The product of its digits is 12902400, while the sum is 58.

The spelling of 38358825781 in words is "thirty-eight billion, three hundred fifty-eight million, eight hundred twenty-five thousand, seven hundred eighty-one".