28164637663 has 2 divisors, whose sum is σ = 28164637664. Its totient is φ = 28164637662.

The previous prime is 28164637643. The next prime is 28164637693. The reversal of 28164637663 is 36673646182.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28164637663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28164637663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28164637643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14082318831 + 14082318832.

It is an arithmetic number, because the mean of its divisors is an integer number (14082318832).

Almost surely, 2^28164637663 is an apocalyptic number.

28164637663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28164637663 is an equidigital number, since it uses as much as digits as its factorization.

28164637663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 52.

The spelling of 28164637663 in words is "twenty-eight billion, one hundred sixty-four million, six hundred thirty-seven thousand, six hundred sixty-three".