161813760 has 72 divisors (see below), whose sum is σ = 516804960. Its totient is φ = 43149312.

The previous prime is 161813759. The next prime is 161813761. The reversal of 161813760 is 67318161.

It is an interprime number because it is at equal distance from previous prime (161813759) and next prime (161813761).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161813761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17230 + ... + 24909.

Almost surely, 2^161813760 is an apocalyptic number.

161813760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161813760 is an abundant number, since it is smaller than the sum of its proper divisors (354991200).

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

161813760 is an equidigital number, since it uses as much as digits as its factorization.

161813760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42163 (or 42149 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 161813760 is about 12720.6037592561. The cubic root of 161813760 is about 544.9271961779.

The spelling of 161813760 in words is "one hundred sixty-one million, eight hundred thirteen thousand, seven hundred sixty".