28545451787 has 2 divisors, whose sum is σ = 28545451788. Its totient is φ = 28545451786.

The previous prime is 28545451769. The next prime is 28545451793. The reversal of 28545451787 is 78715454582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28545451787 - 2¹² = 28545447691 is a prime.

It is not a weakly prime, because it can be changed into another prime (28545451747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14272725893 + 14272725894.

It is an arithmetic number, because the mean of its divisors is an integer number (14272725894).

Almost surely, 2^28545451787 is an apocalyptic number.

28545451787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28545451787 is an equidigital number, since it uses as much as digits as its factorization.

28545451787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544000, while the sum is 56.

The spelling of 28545451787 in words is "twenty-eight billion, five hundred forty-five million, four hundred fifty-one thousand, seven hundred eighty-seven".