8081564 has 6 divisors (see below), whose sum is σ = 14142744. Its totient is φ = 4040780.

The previous prime is 8081561. The next prime is 8081569. The reversal of 8081564 is 4651808.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8081564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010192 + ... + 1010199.

It is an arithmetic number, because the mean of its divisors is an integer number (2357124).

Almost surely, 2^8081564 is an apocalyptic number.

It is an amenable number.

8081564 is a deficient number, since it is larger than the sum of its proper divisors (6061180).

8081564 is a wasteful number, since it uses less digits than its factorization.

8081564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020395 (or 2020393 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 8081564 is about 2842.8091740389. The cubic root of 8081564 is about 200.6774030353.

The spelling of 8081564 in words is "eight million, eighty-one thousand, five hundred sixty-four".