38103181781 has 4 divisors (see below), whose sum is σ = 43546493472. Its totient is φ = 32659870092.

The previous prime is 38103181759. The next prime is 38103181789. The reversal of 38103181781 is 18718130183.

It is a happy number.

38103181781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-38103181781 is a prime.

It is a super-2 number, since 2×38103181781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38103181789) 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, 2721655835 + ... + 2721655848.

It is an arithmetic number, because the mean of its divisors is an integer number (10886623368).

Almost surely, 2^38103181781 is an apocalyptic number.

It is an amenable number.

38103181781 is a deficient number, since it is larger than the sum of its proper divisors (5443311691).

38103181781 is an equidigital number, since it uses as much as digits as its factorization.

38103181781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443311690.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 38103181781 in words is "thirty-eight billion, one hundred three million, one hundred eighty-one thousand, seven hundred eighty-one".