161763520 has 28 divisors (see below), whose sum is σ = 385200144. Its totient is φ = 64705280.

The previous prime is 161763493. The next prime is 161763523. The reversal of 161763520 is 25367161.

It is not an unprimeable number, because it can be changed into a prime (161763523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252436 + ... + 253075.

It is an arithmetic number, because the mean of its divisors is an integer number (13757148).

Almost surely, 2^161763520 is an apocalyptic number.

161763520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161763520 is an abundant number, since it is smaller than the sum of its proper divisors (223436624).

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

161763520 is an equidigital number, since it uses as much as digits as its factorization.

161763520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505528 (or 505518 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 161763520 is about 12718.6288569169. The cubic root of 161763520 is about 544.8707939367.

The spelling of 161763520 in words is "one hundred sixty-one million, seven hundred sixty-three thousand, five hundred twenty".