8257238918444 has 12 divisors (see below), whose sum is σ = 14462280578424. Its totient is φ = 4125158753184.

The previous prime is 8257238918419. The next prime is 8257238918447. The reversal of 8257238918444 is 4448198327528.

It is a super-2 number, since 2×8257238918444² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8257238918447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865171142 + ... + 865180685.

It is an arithmetic number, because the mean of its divisors is an integer number (1205190048202).

Almost surely, 2^{8257238918444} is an apocalyptic number.

It is an amenable number.

8257238918444 is a deficient number, since it is larger than the sum of its proper divisors (6205041659980).

8257238918444 is a wasteful number, since it uses less digits than its factorization.

8257238918444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730353024 (or 1730353022 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 65.

The spelling of 8257238918444 in words is "eight trillion, two hundred fifty-seven billion, two hundred thirty-eight million, nine hundred eighteen thousand, four hundred forty-four".