163929509475 has 24 divisors (see below), whose sum is σ = 271187819952. Its totient is φ = 87378201600.

The previous prime is 163929509459. The next prime is 163929509519. The reversal of 163929509475 is 574905929361.

It is not a de Polignac number, because 163929509475 - 2⁴ = 163929509459 is a prime.

It is a super-2 number, since 2×163929509475² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505942 + ... + 764091.

It is an arithmetic number, because the mean of its divisors is an integer number (11299492498).

Almost surely, 2^163929509475 is an apocalyptic number.

163929509475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163929509475 is a deficient number, since it is larger than the sum of its proper divisors (107258310477).

163929509475 is a wasteful number, since it uses less digits than its factorization.

163929509475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271767 (or 1271762 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 60.

The spelling of 163929509475 in words is "one hundred sixty-three billion, nine hundred twenty-nine million, five hundred nine thousand, four hundred seventy-five".