28465481949497 has 2 divisors, whose sum is σ = 28465481949498. Its totient is φ = 28465481949496.

The previous prime is 28465481949449. The next prime is 28465481949539. The reversal of 28465481949497 is 79494918456482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28179705103936 + 285776845561 = 5308456^2 + 534581^2 .

It is a cyclic number.

It is not a de Polignac number, because 28465481949497 - 2¹⁴ = 28465481933113 is a prime.

It is not a weakly prime, because it can be changed into another prime (28465481049497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232740974748 + 14232740974749.

It is an arithmetic number, because the mean of its divisors is an integer number (14232740974749).

Almost surely, 2^{28465481949497} is an apocalyptic number.

It is an amenable number.

28465481949497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465481949497 is an equidigital number, since it uses as much as digits as its factorization.

28465481949497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5016453120, while the sum is 80.

The spelling of 28465481949497 in words is "twenty-eight trillion, four hundred sixty-five billion, four hundred eighty-one million, nine hundred forty-nine thousand, four hundred ninety-seven".