28125980420999 has 2 divisors, whose sum is σ = 28125980421000. Its totient is φ = 28125980420998.

The previous prime is 28125980420957. The next prime is 28125980421023. The reversal of 28125980420999 is 99902408952182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28125980420999 - 2²⁰ = 28125979372423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28125980420299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14062990210499 + 14062990210500.

It is an arithmetic number, because the mean of its divisors is an integer number (14062990210500).

Almost surely, 2^{28125980420999} is an apocalyptic number.

28125980420999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28125980420999 is an equidigital number, since it uses as much as digits as its factorization.

28125980420999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67184640, while the sum is 68.

The spelling of 28125980420999 in words is "twenty-eight trillion, one hundred twenty-five billion, nine hundred eighty million, four hundred twenty thousand, nine hundred ninety-nine".