28015815011 has 2 divisors, whose sum is σ = 28015815012. Its totient is φ = 28015815010.

The previous prime is 28015814987. The next prime is 28015815089. The reversal of 28015815011 is 11051851082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28015815011 is a prime.

It is not a weakly prime, because it can be changed into another prime (28015814011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14007907505 + 14007907506.

It is an arithmetic number, because the mean of its divisors is an integer number (14007907506).

Almost surely, 2^28015815011 is an apocalyptic number.

28015815011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28015815011 is an equidigital number, since it uses as much as digits as its factorization.

28015815011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 32.

The spelling of 28015815011 in words is "twenty-eight billion, fifteen million, eight hundred fifteen thousand, eleven".