861374473169 has 24 divisors (see below), whose sum is σ = 1061118982728. Its totient is φ = 694778757120.

The previous prime is 861374473117. The next prime is 861374473307. The reversal of 861374473169 is 961374473168.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 509146467025 + 352228006144 = 713545^2 + 593488^2 .

It is not a de Polignac number, because 861374473169 - 2⁸ = 861374472913 is a prime.

It is a super-2 number, since 2×861374473169² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (861374473109) 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, 5318897 + ... + 5478449.

It is an arithmetic number, because the mean of its divisors is an integer number (44213290947).

Almost surely, 2^861374473169 is an apocalyptic number.

It is an amenable number.

861374473169 is a deficient number, since it is larger than the sum of its proper divisors (199744509559).

861374473169 is a wasteful number, since it uses less digits than its factorization.

861374473169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166065 (or 166058 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 59.

Subtracting 861374473169 from its reverse (961374473168), we obtain a palindrome (99999999999).

The spelling of 861374473169 in words is "eight hundred sixty-one billion, three hundred seventy-four million, four hundred seventy-three thousand, one hundred sixty-nine".