28011664123 has 2 divisors, whose sum is σ = 28011664124. Its totient is φ = 28011664122.

The previous prime is 28011664117. The next prime is 28011664141. The reversal of 28011664123 is 32146611082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28011664123 is a prime.

It is not a weakly prime, because it can be changed into another prime (28011664103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14005832061 + 14005832062.

It is an arithmetic number, because the mean of its divisors is an integer number (14005832062).

Almost surely, 2^28011664123 is an apocalyptic number.

28011664123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28011664123 is an equidigital number, since it uses as much as digits as its factorization.

28011664123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 28011664123 in words is "twenty-eight billion, eleven million, six hundred sixty-four thousand, one hundred twenty-three".