8445944780253 has 40 divisors (see below), whose sum is σ = 13589679303200. Its totient is φ = 5210227828512.

The previous prime is 8445944780243. The next prime is 8445944780279. The reversal of 8445944780253 is 3520874495448.

8445944780253 is a `hidden beast` number, since 8 + 44 + 59 + 447 + 80 + 25 + 3 = 666.

It is not a de Polignac number, because 8445944780253 - 2²⁵ = 8445911225821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8445944780243) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63747118 + ... + 63879471.

It is an arithmetic number, because the mean of its divisors is an integer number (339741982580).

Almost surely, 2^{8445944780253} is an apocalyptic number.

It is an amenable number.

8445944780253 is a deficient number, since it is larger than the sum of its proper divisors (5143734522947).

8445944780253 is a wasteful number, since it uses less digits than its factorization.

8445944780253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127626663 (or 127626654 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 63.

The spelling of 8445944780253 in words is "eight trillion, four hundred forty-five billion, nine hundred forty-four million, seven hundred eighty thousand, two hundred fifty-three".