17797144781 has 24 divisors (see below), whose sum is σ = 20071580544. Its totient is φ = 15758608320.

The previous prime is 17797144753. The next prime is 17797144801. The reversal of 17797144781 is 18744179771.

It is a happy number.

It is not a de Polignac number, because 17797144781 - 2¹⁸ = 17796882637 is a prime.

It is a super-2 number, since 2×17797144781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17797144711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423920 + ... + 464006.

It is an arithmetic number, because the mean of its divisors is an integer number (836315856).

Almost surely, 2^17797144781 is an apocalyptic number.

It is an amenable number.

17797144781 is a deficient number, since it is larger than the sum of its proper divisors (2274435763).

17797144781 is a wasteful number, since it uses less digits than its factorization.

17797144781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40221 (or 40208 counting only the distinct ones).

The product of its digits is 2765952, while the sum is 56.

The spelling of 17797144781 in words is "seventeen billion, seven hundred ninety-seven million, one hundred forty-four thousand, seven hundred eighty-one".