28799779451 has 2 divisors, whose sum is σ = 28799779452. Its totient is φ = 28799779450.

The previous prime is 28799779409. The next prime is 28799779501. The reversal of 28799779451 is 15497799782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28799779451 - 2⁶ = 28799779387 is a prime.

It is a super-2 number, since 2×28799779451² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28799770451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399889725 + 14399889726.

It is an arithmetic number, because the mean of its divisors is an integer number (14399889726).

Almost surely, 2^28799779451 is an apocalyptic number.

28799779451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28799779451 is an equidigital number, since it uses as much as digits as its factorization.

28799779451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 68.

The spelling of 28799779451 in words is "twenty-eight billion, seven hundred ninety-nine million, seven hundred seventy-nine thousand, four hundred fifty-one".