28668500461 has 2 divisors, whose sum is σ = 28668500462. Its totient is φ = 28668500460.

The previous prime is 28668500453. The next prime is 28668500467. The reversal of 28668500461 is 16400586682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21376194436 + 7292306025 = 146206^2 + 85395^2 .

It is a cyclic number.

It is not a de Polignac number, because 28668500461 - 2³ = 28668500453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28668500467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334250230 + 14334250231.

It is an arithmetic number, because the mean of its divisors is an integer number (14334250231).

Almost surely, 2^28668500461 is an apocalyptic number.

It is an amenable number.

28668500461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668500461 is an equidigital number, since it uses as much as digits as its factorization.

28668500461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 28668500461 in words is "twenty-eight billion, six hundred sixty-eight million, five hundred thousand, four hundred sixty-one".