811540004 has 48 divisors (see below), whose sum is σ = 1622025216. Its totient is φ = 351674400.

The previous prime is 811539983. The next prime is 811540049. The reversal of 811540004 is 400045118.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350009 + ... + 352319.

It is an arithmetic number, because the mean of its divisors is an integer number (33792192).

Almost surely, 2^811540004 is an apocalyptic number.

It is an amenable number.

811540004 is a deficient number, since it is larger than the sum of its proper divisors (810485212).

811540004 is a wasteful number, since it uses less digits than its factorization.

811540004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2694 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 811540004 is about 28487.5412066398. The cubic root of 811540004 is about 932.7601371090.

The spelling of 811540004 in words is "eight hundred eleven million, five hundred forty thousand, four".