28453148024921 has 2 divisors, whose sum is σ = 28453148024922. Its totient is φ = 28453148024920.

The previous prime is 28453148024911. The next prime is 28453148025007. The reversal of 28453148024921 is 12942084135482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24739283299600 + 3713864725321 = 4973860^2 + 1927139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28453148024921 is a prime.

It is not a weakly prime, because it can be changed into another prime (28453148024911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14226574012460 + 14226574012461.

It is an arithmetic number, because the mean of its divisors is an integer number (14226574012461).

Almost surely, 2^{28453148024921} is an apocalyptic number.

It is an amenable number.

28453148024921 is a deficient number, since it is larger than the sum of its proper divisors (1).

28453148024921 is an equidigital number, since it uses as much as digits as its factorization.

28453148024921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 28453148024921 in words is "twenty-eight trillion, four hundred fifty-three billion, one hundred forty-eight million, twenty-four thousand, nine hundred twenty-one".