17982697557 has 32 divisors (see below), whose sum is σ = 26883348480. Its totient is φ = 10599937920.

The previous prime is 17982697553. The next prime is 17982697619. The reversal of 17982697557 is 75579628971.

It is a happy number.

It is not a de Polignac number, because 17982697557 - 2² = 17982697553 is a prime.

It is a super-2 number, since 2×17982697557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17982697553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123193 + ... + 226145.

It is an arithmetic number, because the mean of its divisors is an integer number (840104640).

Almost surely, 2^17982697557 is an apocalyptic number.

It is an amenable number.

17982697557 is a deficient number, since it is larger than the sum of its proper divisors (8900650923).

17982697557 is a wasteful number, since it uses less digits than its factorization.

17982697557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103113.

The product of its digits is 66679200, while the sum is 66.

The spelling of 17982697557 in words is "seventeen billion, nine hundred eighty-two million, six hundred ninety-seven thousand, five hundred fifty-seven".