161000700 has 72 divisors (see below), whose sum is σ = 532382592. Its totient is φ = 36799680.

The previous prime is 161000689. The next prime is 161000747. The reversal of 161000700 is 7000161.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 161000700.

It is a congruent number.

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, 36234 + ... + 40433.

Almost surely, 2^161000700 is an apocalyptic number.

161000700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161000700 is an abundant number, since it is smaller than the sum of its proper divisors (371381892).

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

161000700 is a wasteful number, since it uses less digits than its factorization.

161000700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76691 (or 76684 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 161000700 is about 12688.6051242838. The cubic root of 161000700 is about 544.0129709638.

Adding to 161000700 its reverse (7000161), we get a palindrome (168000861).

The spelling of 161000700 in words is "one hundred sixty-one million, seven hundred", and thus it is an aban number.