11565016506 has 24 divisors (see below), whose sum is σ = 25374722880. Its totient is φ = 3806207496.

The previous prime is 11565016483. The next prime is 11565016543. The reversal of 11565016506 is 60561056511.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4065040 + ... + 4067883.

It is an arithmetic number, because the mean of its divisors is an integer number (1057280120).

Almost surely, 2^11565016506 is an apocalyptic number.

11565016506 is an abundant number, since it is smaller than the sum of its proper divisors (13809706374).

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

11565016506 is a wasteful number, since it uses less digits than its factorization.

11565016506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133010 (or 8133007 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 11565016506 in words is "eleven billion, five hundred sixty-five million, sixteen thousand, five hundred six".