28661005184423 has 2 divisors, whose sum is σ = 28661005184424. Its totient is φ = 28661005184422.

The previous prime is 28661005184381. The next prime is 28661005184503. The reversal of 28661005184423 is 32448150016682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28661005184423 - 2²² = 28661000990119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28661005384423) 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, 14330502592211 + 14330502592212.

It is an arithmetic number, because the mean of its divisors is an integer number (14330502592212).

Almost surely, 2^{28661005184423} is an apocalyptic number.

28661005184423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28661005184423 is an equidigital number, since it uses as much as digits as its factorization.

28661005184423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 28661005184423 in words is "twenty-eight trillion, six hundred sixty-one billion, five million, one hundred eighty-four thousand, four hundred twenty-three".