15781093103 has 2 divisors, whose sum is σ = 15781093104. Its totient is φ = 15781093102.

The previous prime is 15781093099. The next prime is 15781093123. The reversal of 15781093103 is 30139018751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15781093103 - 2² = 15781093099 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15781093123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7890546551 + 7890546552.

It is an arithmetic number, because the mean of its divisors is an integer number (7890546552).

Almost surely, 2^15781093103 is an apocalyptic number.

15781093103 is a deficient number, since it is larger than the sum of its proper divisors (1).

15781093103 is an equidigital number, since it uses as much as digits as its factorization.

15781093103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 15781093103 in words is "fifteen billion, seven hundred eighty-one million, ninety-three thousand, one hundred three".