28013107566 has 32 divisors (see below), whose sum is σ = 57403584000. Its totient is φ = 9108227520.

The previous prime is 28013107541. The next prime is 28013107589. The reversal of 28013107566 is 66570131082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2256765 + ... + 2269143.

It is an arithmetic number, because the mean of its divisors is an integer number (1793862000).

Almost surely, 2^28013107566 is an apocalyptic number.

28013107566 is an abundant number, since it is smaller than the sum of its proper divisors (29390476434).

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

28013107566 is a wasteful number, since it uses less digits than its factorization.

28013107566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21624.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 28013107566 in words is "twenty-eight billion, thirteen million, one hundred seven thousand, five hundred sixty-six".