161776460 has 24 divisors (see below), whose sum is σ = 341498976. Its totient is φ = 64373760.

The previous prime is 161776451. The next prime is 161776463. The reversal of 161776460 is 64677161.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161776463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17096 + ... + 24815.

It is an arithmetic number, because the mean of its divisors is an integer number (14229124).

Almost surely, 2^161776460 is an apocalyptic number.

161776460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161776460 is an abundant number, since it is smaller than the sum of its proper divisors (179722516).

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

161776460 is a wasteful number, since it uses less digits than its factorization.

161776460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42113 (or 42111 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 161776460 is about 12719.1375493781. The cubic root of 161776460 is about 544.8853222227.

The spelling of 161776460 in words is "one hundred sixty-one million, seven hundred seventy-six thousand, four hundred sixty".