8445171772040 has 32 divisors (see below), whose sum is σ = 20119379811480. Its totient is φ = 3179358784512.

The previous prime is 8445171772013. The next prime is 8445171772123. The reversal of 8445171772040 is 402771715448.

It can be written as a sum of positive squares in 4 ways, for example, as 6563649289444 + 1881522482596 = 2561962^2 + 1371686^2 .

It is a super-2 number, since 2×8445171772040² (a number of 27 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 8445171772040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6209684447 + ... + 6209685806.

Almost surely, 2^{8445171772040} is an apocalyptic number.

It is an amenable number.

8445171772040 is an abundant number, since it is smaller than the sum of its proper divisors (11674208039440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8445171772040 is a wasteful number, since it uses less digits than its factorization.

8445171772040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12419370281 (or 12419370277 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 50.

The spelling of 8445171772040 in words is "eight trillion, four hundred forty-five billion, one hundred seventy-one million, seven hundred seventy-two thousand, forty".