17780058081 has 6 divisors (see below), whose sum is σ = 25682306130. Its totient is φ = 11853372048.

The previous prime is 17780058041. The next prime is 17780058139. The reversal of 17780058081 is 18085008771.

It can be written as a sum of positive squares in only one way, i.e., 10544003856 + 7236054225 = 102684^2 + 85065^2 .

It is not a de Polignac number, because 17780058081 - 2⁶ = 17780058017 is a prime.

It is a super-2 number, since 2×17780058081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17780058041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 987780996 + ... + 987781013.

It is an arithmetic number, because the mean of its divisors is an integer number (4280384355).

Almost surely, 2^17780058081 is an apocalyptic number.

It is an amenable number.

17780058081 is a deficient number, since it is larger than the sum of its proper divisors (7902248049).

17780058081 is a wasteful number, since it uses less digits than its factorization.

17780058081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975562015 (or 1975562012 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 45.

The spelling of 17780058081 in words is "seventeen billion, seven hundred eighty million, fifty-eight thousand, eighty-one".