10549978173 has 18 divisors (see below), whose sum is σ = 17726834814. Its totient is φ = 6028558704.

The previous prime is 10549978139. The next prime is 10549978213. The reversal of 10549978173 is 37187994501.

It is a happy number.

10549978173 is a `hidden beast` number, since 1 + 0 + 5 + 499 + 7 + 81 + 73 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9486370404 + 1063607769 = 97398^2 + 32613^2 .

It is not a de Polignac number, because 10549978173 - 2¹⁰ = 10549977149 is a prime.

It is a super-2 number, since 2×10549978173² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10549978273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11960986 + ... + 11961867.

Almost surely, 2^10549978173 is an apocalyptic number.

It is an amenable number.

10549978173 is a deficient number, since it is larger than the sum of its proper divisors (7176856641).

10549978173 is a wasteful number, since it uses less digits than its factorization.

10549978173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23922873 (or 23922863 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 10549978173 in words is "ten billion, five hundred forty-nine million, nine hundred seventy-eight thousand, one hundred seventy-three".