815381013803 has 2 divisors, whose sum is σ = 815381013804. Its totient is φ = 815381013802.

The previous prime is 815381013793. The next prime is 815381013829. The reversal of 815381013803 is 308310183518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 815381013803 - 2²⁸ = 815112578347 is a prime.

It is not a weakly prime, because it can be changed into another prime (815381013203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407690506901 + 407690506902.

It is an arithmetic number, because the mean of its divisors is an integer number (407690506902).

Almost surely, 2^815381013803 is an apocalyptic number.

815381013803 is a deficient number, since it is larger than the sum of its proper divisors (1).

815381013803 is an equidigital number, since it uses as much as digits as its factorization.

815381013803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 815381013803 in words is "eight hundred fifteen billion, three hundred eighty-one million, thirteen thousand, eight hundred three".