161150780 has 96 divisors (see below), whose sum is σ = 416102400. Its totient is φ = 51190272.

The previous prime is 161150779. The next prime is 161150789. The reversal of 161150780 is 87051161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161150789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124376 + ... + 125664.

It is an arithmetic number, because the mean of its divisors is an integer number (4334400).

Almost surely, 2^161150780 is an apocalyptic number.

161150780 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 161150780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208051200).

161150780 is an abundant number, since it is smaller than the sum of its proper divisors (254951620).

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

161150780 is a wasteful number, since it uses less digits than its factorization.

161150780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1369 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 161150780 is about 12694.5177143521. The cubic root of 161150780 is about 544.1819559654.

The spelling of 161150780 in words is "one hundred sixty-one million, one hundred fifty thousand, seven hundred eighty".