161670506500 has 48 divisors (see below), whose sum is σ = 353129736960. Its totient is φ = 64660629600.

The previous prime is 161670506497. The next prime is 161670506519. The reversal of 161670506500 is 5605076161.

It is a super-2 number, since 2×161670506500² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161670506500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6491071 + ... + 6515929.

It is an arithmetic number, because the mean of its divisors is an integer number (7356869520).

Almost surely, 2^161670506500 is an apocalyptic number.

161670506500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161670506500 is an abundant number, since it is smaller than the sum of its proper divisors (191459230460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161670506500 is a wasteful number, since it uses less digits than its factorization.

161670506500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37885 (or 37873 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 161670506500 in words is "one hundred sixty-one billion, six hundred seventy million, five hundred six thousand, five hundred".