84440488453 has 2 divisors, whose sum is σ = 84440488454. Its totient is φ = 84440488452.

The previous prime is 84440488417. The next prime is 84440488621. The reversal of 84440488453 is 35488404448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59613128964 + 24827359489 = 244158^2 + 157567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84440488453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84440488453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84440482453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42220244226 + 42220244227.

It is an arithmetic number, because the mean of its divisors is an integer number (42220244227).

Almost surely, 2^84440488453 is an apocalyptic number.

It is an amenable number.

84440488453 is a deficient number, since it is larger than the sum of its proper divisors (1).

84440488453 is an equidigital number, since it uses as much as digits as its factorization.

84440488453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7864320, while the sum is 52.

The spelling of 84440488453 in words is "eighty-four billion, four hundred forty million, four hundred eighty-eight thousand, four hundred fifty-three".