161015600 has 60 divisors (see below), whose sum is σ = 393241200. Its totient is φ = 63340800.

The previous prime is 161015597. The next prime is 161015611. The reversal of 161015600 is 6510161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21101 + ... + 27699.

It is an arithmetic number, because the mean of its divisors is an integer number (6554020).

Almost surely, 2^161015600 is an apocalyptic number.

161015600 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 161015600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196620600).

161015600 is an abundant number, since it is smaller than the sum of its proper divisors (232225600).

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

161015600 is a wasteful number, since it uses less digits than its factorization.

161015600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 161015600 is about 12689.1922516762. The cubic root of 161015600 is about 544.0297525538.

Adding to 161015600 its reverse (6510161), we get a palindrome (167525761).

The spelling of 161015600 in words is "one hundred sixty-one million, fifteen thousand, six hundred".