811564002 has 16 divisors (see below), whose sum is σ = 1803475680. Its totient is φ = 270521316.

The previous prime is 811564001. The next prime is 811564049. The reversal of 811564002 is 200465118.

811564002 is a `hidden beast` number, since 8 + 1 + 15 + 640 + 0 + 2 = 666.

It is a super-2 number, since 2×811564002² = 1317272258684512008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (811564001) 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, 7514428 + ... + 7514535.

It is an arithmetic number, because the mean of its divisors is an integer number (112717230).

Almost surely, 2^811564002 is an apocalyptic number.

811564002 is an abundant number, since it is smaller than the sum of its proper divisors (991911678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811564002 is a wasteful number, since it uses less digits than its factorization.

811564002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15028974 (or 15028968 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 811564002 is about 28487.9624051984. The cubic root of 811564002 is about 932.7693312161.

It can be divided in two parts, 81156 and 4002, that added together give a palindrome (85158).

The spelling of 811564002 in words is "eight hundred eleven million, five hundred sixty-four thousand, two".