17849425945 has 24 divisors (see below), whose sum is σ = 23349519000. Its totient is φ = 13092558336.

The previous prime is 17849425939. The next prime is 17849425967. The reversal of 17849425945 is 54952494871.

It can be written as a sum of positive squares in 12 ways, for example, as 11782885401 + 6066540544 = 108549^2 + 77888^2 .

It is not a de Polignac number, because 17849425945 - 2⁷ = 17849425817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17849425945.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55021 + ... + 196789.

It is an arithmetic number, because the mean of its divisors is an integer number (972896625).

Almost surely, 2^17849425945 is an apocalyptic number.

It is an amenable number.

17849425945 is a deficient number, since it is larger than the sum of its proper divisors (5500093055).

17849425945 is a wasteful number, since it uses less digits than its factorization.

17849425945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141949 (or 141936 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 58.

The spelling of 17849425945 in words is "seventeen billion, eight hundred forty-nine million, four hundred twenty-five thousand, nine hundred forty-five".