811364551 has 4 divisors (see below), whose sum is σ = 819729232. Its totient is φ = 802999872.

The previous prime is 811364513. The next prime is 811364563. The reversal of 811364551 is 155463118.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 811364551 - 2⁹ = 811364039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811364501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4182195 + ... + 4182388.

It is an arithmetic number, because the mean of its divisors is an integer number (204932308).

Almost surely, 2^811364551 is an apocalyptic number.

811364551 is a deficient number, since it is larger than the sum of its proper divisors (8364681).

811364551 is an equidigital number, since it uses as much as digits as its factorization.

811364551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364680.

The product of its digits is 14400, while the sum is 34.

The square root of 811364551 is about 28484.4615711795. The cubic root of 811364551 is about 932.6929120969.

The spelling of 811364551 in words is "eight hundred eleven million, three hundred sixty-four thousand, five hundred fifty-one".