17390639458 has 12 divisors (see below), whose sum is σ = 26724037158. Its totient is φ = 8482656240.

The previous prime is 17390639443. The next prime is 17390639479. The reversal of 17390639458 is 85493609371.

It can be written as a sum of positive squares in only one way, i.e., 17178558489 + 212080969 = 131067^2 + 14563^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17390639399 and 17390639408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1186885 + ... + 1201447.

Almost surely, 2^17390639458 is an apocalyptic number.

17390639458 is a deficient number, since it is larger than the sum of its proper divisors (9333397700).

17390639458 is an frugal number, since it uses more digits than its factorization.

17390639458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29169 (or 14606 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 17390639458 in words is "seventeen billion, three hundred ninety million, six hundred thirty-nine thousand, four hundred fifty-eight".