28621710451 has 2 divisors, whose sum is σ = 28621710452. Its totient is φ = 28621710450.

The previous prime is 28621710433. The next prime is 28621710479. The reversal of 28621710451 is 15401712682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28621710451 - 2¹¹ = 28621708403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28621710451.

It is not a weakly prime, because it can be changed into another prime (28621710421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14310855225 + 14310855226.

It is an arithmetic number, because the mean of its divisors is an integer number (14310855226).

Almost surely, 2^28621710451 is an apocalyptic number.

28621710451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28621710451 is an equidigital number, since it uses as much as digits as its factorization.

28621710451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 28621710451 in words is "twenty-eight billion, six hundred twenty-one million, seven hundred ten thousand, four hundred fifty-one".