811025580 has 48 divisors (see below), whose sum is σ = 2323689984. Its totient is φ = 211243200.

The previous prime is 811025573. The next prime is 811025587. The reversal of 811025580 is 85520118.

It is an interprime number because it is at equal distance from previous prime (811025573) and next prime (811025587).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (811025587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154596 + ... + 159755.

It is an arithmetic number, because the mean of its divisors is an integer number (48410208).

Almost surely, 2^811025580 is an apocalyptic number.

It is an amenable number.

811025580 is an abundant number, since it is smaller than the sum of its proper divisors (1512664404).

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

811025580 is a wasteful number, since it uses less digits than its factorization.

811025580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314406 (or 314404 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 811025580 is about 28478.5108458992. The cubic root of 811025580 is about 932.5630075278.

Adding to 811025580 its reverse (85520118), we get a palindrome (896545698).

The spelling of 811025580 in words is "eight hundred eleven million, twenty-five thousand, five hundred eighty".