816249581313 has 8 divisors (see below), whose sum is σ = 1135651591488. Its totient is φ = 520506979344.

The previous prime is 816249581281. The next prime is 816249581363. The reversal of 816249581313 is 313185942618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816249581313 - 2⁵ = 816249581281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816249581363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5914851970 + ... + 5914852107.

It is an arithmetic number, because the mean of its divisors is an integer number (141956448936).

Almost surely, 2^816249581313 is an apocalyptic number.

It is an amenable number.

816249581313 is a deficient number, since it is larger than the sum of its proper divisors (319402010175).

816249581313 is a wasteful number, since it uses less digits than its factorization.

816249581313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11829704103.

The product of its digits is 1244160, while the sum is 51.

The spelling of 816249581313 in words is "eight hundred sixteen billion, two hundred forty-nine million, five hundred eighty-one thousand, three hundred thirteen".