28551685399 has 2 divisors, whose sum is σ = 28551685400. Its totient is φ = 28551685398.

The previous prime is 28551685343. The next prime is 28551685403. The reversal of 28551685399 is 99358615582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28551685399 - 2²³ = 28543296791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28551685199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14275842699 + 14275842700.

It is an arithmetic number, because the mean of its divisors is an integer number (14275842700).

Almost surely, 2^28551685399 is an apocalyptic number.

28551685399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28551685399 is an equidigital number, since it uses as much as digits as its factorization.

28551685399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 61.

The spelling of 28551685399 in words is "twenty-eight billion, five hundred fifty-one million, six hundred eighty-five thousand, three hundred ninety-nine".