28785694451 has 2 divisors, whose sum is σ = 28785694452. Its totient is φ = 28785694450.

The previous prime is 28785694429. The next prime is 28785694471. The reversal of 28785694451 is 15449658782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28785694451 - 2¹⁰ = 28785693427 is a prime.

It is not a weakly prime, because it can be changed into another prime (28785694471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392847225 + 14392847226.

It is an arithmetic number, because the mean of its divisors is an integer number (14392847226).

Almost surely, 2^28785694451 is an apocalyptic number.

28785694451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28785694451 is an equidigital number, since it uses as much as digits as its factorization.

28785694451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19353600, while the sum is 59.

The spelling of 28785694451 in words is "twenty-eight billion, seven hundred eighty-five million, six hundred ninety-four thousand, four hundred fifty-one".