810734561 has 8 divisors (see below), whose sum is σ = 997827264. Its totient is φ = 641460240.

The previous prime is 810734543. The next prime is 810734609. The reversal of 810734561 is 165437018.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-810734561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810734501) 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, 4454495 + ... + 4454676.

It is an arithmetic number, because the mean of its divisors is an integer number (124728408).

Almost surely, 2^810734561 is an apocalyptic number.

It is an amenable number.

810734561 is a deficient number, since it is larger than the sum of its proper divisors (187092703).

810734561 is a wasteful number, since it uses less digits than its factorization.

810734561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8909191.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 810734561 is about 28473.4009384197. The cubic root of 810734561 is about 932.4514508239.

The spelling of 810734561 in words is "eight hundred ten million, seven hundred thirty-four thousand, five hundred sixty-one".