7985540564 has 12 divisors (see below), whose sum is σ = 13996299744. Its totient is φ = 3986597784.

The previous prime is 7985540551. The next prime is 7985540597. The reversal of 7985540564 is 4650455897.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540214 + ... + 1545389.

It is an arithmetic number, because the mean of its divisors is an integer number (1166358312).

Almost surely, 2^7985540564 is an apocalyptic number.

It is an amenable number.

7985540564 is a deficient number, since it is larger than the sum of its proper divisors (6010759180).

7985540564 is a wasteful number, since it uses less digits than its factorization.

7985540564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086254 (or 3086252 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 53.

The square root of 7985540564 is about 89361.8518384663. The cubic root of 7985540564 is about 1998.7943203143.

The spelling of 7985540564 in words is "seven billion, nine hundred eighty-five million, five hundred forty thousand, five hundred sixty-four".