161405676100 has 72 divisors (see below), whose sum is σ = 354781042560. Its totient is φ = 63728484480.

The previous prime is 161405676073. The next prime is 161405676137. The reversal of 161405676100 is 1676504161.

It is a super-2 number, since 2×161405676100² (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 161405676100.

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, 10192789 + ... + 10208611.

It is an arithmetic number, because the mean of its divisors is an integer number (4927514480).

Almost surely, 2^161405676100 is an apocalyptic number.

161405676100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161405676100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177390521280).

161405676100 is an abundant number, since it is smaller than the sum of its proper divisors (193375366460).

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

161405676100 is a wasteful number, since it uses less digits than its factorization.

161405676100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17149 (or 17142 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 161405676100 in words is "one hundred sixty-one billion, four hundred five million, six hundred seventy-six thousand, one hundred".