28821742633 has 2 divisors, whose sum is σ = 28821742634. Its totient is φ = 28821742632.

The previous prime is 28821742603. The next prime is 28821742639. The reversal of 28821742633 is 33624712882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17233650729 + 11588091904 = 131277^2 + 107648^2 .

It is a cyclic number.

It is not a de Polignac number, because 28821742633 - 2³³ = 20231808041 is a prime.

It is not a weakly prime, because it can be changed into another prime (28821742639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14410871316 + 14410871317.

It is an arithmetic number, because the mean of its divisors is an integer number (14410871317).

Almost surely, 2^28821742633 is an apocalyptic number.

It is an amenable number.

28821742633 is a deficient number, since it is larger than the sum of its proper divisors (1).

28821742633 is an equidigital number, since it uses as much as digits as its factorization.

28821742633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 46.

The spelling of 28821742633 in words is "twenty-eight billion, eight hundred twenty-one million, seven hundred forty-two thousand, six hundred thirty-three".