816578013 has 8 divisors (see below), whose sum is σ = 1092789376. Its totient is φ = 542376000.

The previous prime is 816577981. The next prime is 816578033. The reversal of 816578013 is 310875618.

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

It is not a de Polignac number, because 816578013 - 2⁵ = 816577981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816578033) 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, 501388 + ... + 503013.

It is an arithmetic number, because the mean of its divisors is an integer number (136598672).

Almost surely, 2^816578013 is an apocalyptic number.

It is an amenable number.

816578013 is a deficient number, since it is larger than the sum of its proper divisors (276211363).

816578013 is a wasteful number, since it uses less digits than its factorization.

816578013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004675.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 816578013 is about 28575.8291743214. The cubic root of 816578013 is about 934.6863363021.

The spelling of 816578013 in words is "eight hundred sixteen million, five hundred seventy-eight thousand, thirteen".