815165216929 has 16 divisors (see below), whose sum is σ = 962013368320. Its totient is φ = 675932176080.

The previous prime is 815165216917. The next prime is 815165216941. The reversal of 815165216929 is 929612561518.

It is an interprime number because it is at equal distance from previous prime (815165216917) and next prime (815165216941).

It is a de Polignac number, because none of the positive numbers 2^k-815165216929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 815165216929.

It is not an unprimeable number, because it can be changed into a prime (815165216959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61839 + ... + 1278340.

It is an arithmetic number, because the mean of its divisors is an integer number (60125835520).

Almost surely, 2^815165216929 is an apocalyptic number.

It is an amenable number.

815165216929 is a deficient number, since it is larger than the sum of its proper divisors (146848151391).

815165216929 is a wasteful number, since it uses less digits than its factorization.

815165216929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343020.

The product of its digits is 2332800, while the sum is 55.

The spelling of 815165216929 in words is "eight hundred fifteen billion, one hundred sixty-five million, two hundred sixteen thousand, nine hundred twenty-nine".