28465481949449 has 2 divisors, whose sum is σ = 28465481949450. Its totient is φ = 28465481949448.

The previous prime is 28465481949439. The next prime is 28465481949497. The reversal of 28465481949449 is 94494918456482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28455023205625 + 10458743824 = 5334325^2 + 102268^2 .

It is a cyclic number.

It is not a de Polignac number, because 28465481949449 - 2¹⁶ = 28465481883913 is a prime.

It is a super-2 number, since 2×28465481949449² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28465481949449.

It is not a weakly prime, because it can be changed into another prime (28465481949419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232740974724 + 14232740974725.

It is an arithmetic number, because the mean of its divisors is an integer number (14232740974725).

Almost surely, 2^{28465481949449} is an apocalyptic number.

It is an amenable number.

28465481949449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465481949449 is an equidigital number, since it uses as much as digits as its factorization.

28465481949449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2866544640, while the sum is 77.

The spelling of 28465481949449 in words is "twenty-eight trillion, four hundred sixty-five billion, four hundred eighty-one million, nine hundred forty-nine thousand, four hundred forty-nine".