8185521642 has 48 divisors (see below), whose sum is σ = 16703552640. Its totient is φ = 2673755136.

The previous prime is 8185521611. The next prime is 8185521653. The reversal of 8185521642 is 2461255818.

It is a junction number, because it is equal to n+sod(n) for n = 8185521594 and 8185521603.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14186058 + ... + 14186634.

It is an arithmetic number, because the mean of its divisors is an integer number (347990680).

Almost surely, 2^8185521642 is an apocalyptic number.

8185521642 is an abundant number, since it is smaller than the sum of its proper divisors (8518030998).

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

8185521642 is a wasteful number, since it uses less digits than its factorization.

8185521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 834 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The square root of 8185521642 is about 90473.8727036706. The cubic root of 8185521642 is about 2015.3421451859.

The spelling of 8185521642 in words is "eight billion, one hundred eighty-five million, five hundred twenty-one thousand, six hundred forty-two".