816075457 has 16 divisors (see below), whose sum is σ = 870819840. Its totient is φ = 763402752.

The previous prime is 816075437. The next prime is 816075473. The reversal of 816075457 is 754570618.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816075457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816075437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155793 + ... + 160945.

It is an arithmetic number, because the mean of its divisors is an integer number (54426240).

It is a Poulet number, since it divides 2^816075456-1.

Almost surely, 2^816075457 is an apocalyptic number.

It is an amenable number.

816075457 is a deficient number, since it is larger than the sum of its proper divisors (54744383).

816075457 is a wasteful number, since it uses less digits than its factorization.

816075457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 816075457 is about 28567.0344453183. The cubic root of 816075457 is about 934.4945486974.

The spelling of 816075457 in words is "eight hundred sixteen million, seventy-five thousand, four hundred fifty-seven".