8185525420 has 48 divisors (see below), whose sum is σ = 17387465760. Its totient is φ = 3236603904.

The previous prime is 8185525393. The next prime is 8185525427. The reversal of 8185525420 is 245255818.

It is not an unprimeable number, because it can be changed into a prime (8185525427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2071887 + ... + 2075833.

It is an arithmetic number, because the mean of its divisors is an integer number (362238870).

Almost surely, 2^8185525420 is an apocalyptic number.

It is an amenable number.

8185525420 is an abundant number, since it is smaller than the sum of its proper divisors (9201940340).

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

8185525420 is a wasteful number, since it uses less digits than its factorization.

8185525420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122 (or 5120 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 40.

The square root of 8185525420 is about 90473.8935826242. The cubic root of 8185525420 is about 2015.3424552440.

The spelling of 8185525420 in words is "eight billion, one hundred eighty-five million, five hundred twenty-five thousand, four hundred twenty".