163129805810 has 32 divisors (see below), whose sum is σ = 310944815280. Its totient is φ = 61405949952.

The previous prime is 163129805777. The next prime is 163129805833. The reversal of 163129805810 is 18508921361.

It can be written as a sum of positive squares in 8 ways, for example, as 144303496129 + 18826309681 = 379873^2 + 137209^2 .

It is a super-2 number, since 2×163129805810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421912 + ... + 1532348.

Almost surely, 2^163129805810 is an apocalyptic number.

163129805810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163129805810 is a deficient number, since it is larger than the sum of its proper divisors (147815009470).

163129805810 is a wasteful number, since it uses less digits than its factorization.

163129805810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119150.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 163129805810 in words is "one hundred sixty-three billion, one hundred twenty-nine million, eight hundred five thousand, eight hundred ten".