816513469 has 16 divisors (see below), whose sum is σ = 846547200. Its totient is φ = 787103424.

The previous prime is 816513461. The next prime is 816513497. The reversal of 816513469 is 964315618.

It is a cyclic number.

It is not a de Polignac number, because 816513469 - 2³ = 816513461 is a prime.

It is a super-2 number, since 2×816513469² = 1333388490116827922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816513461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151287 + ... + 1151995.

It is an arithmetic number, because the mean of its divisors is an integer number (52909200).

Almost surely, 2^816513469 is an apocalyptic number.

It is an amenable number.

816513469 is a deficient number, since it is larger than the sum of its proper divisors (30033731).

816513469 is a wasteful number, since it uses less digits than its factorization.

816513469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092.

The product of its digits is 155520, while the sum is 43.

The square root of 816513469 is about 28574.6998059472. The cubic root of 816513469 is about 934.6617091453.

The spelling of 816513469 in words is "eight hundred sixteen million, five hundred thirteen thousand, four hundred sixty-nine".