28417685123 has 2 divisors, whose sum is σ = 28417685124. Its totient is φ = 28417685122.

The previous prime is 28417685113. The next prime is 28417685147. The reversal of 28417685123 is 32158671482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28417685123 - 2²⁶ = 28350576259 is a prime.

It is not a weakly prime, because it can be changed into another prime (28417685113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14208842561 + 14208842562.

It is an arithmetic number, because the mean of its divisors is an integer number (14208842562).

Almost surely, 2^28417685123 is an apocalyptic number.

28417685123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28417685123 is an equidigital number, since it uses as much as digits as its factorization.

28417685123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 47.

The spelling of 28417685123 in words is "twenty-eight billion, four hundred seventeen million, six hundred eighty-five thousand, one hundred twenty-three".