161623360 has 28 divisors (see below), whose sum is σ = 384866388. Its totient is φ = 64649216.

The previous prime is 161623339. The next prime is 161623417. The reversal of 161623360 is 63326161.

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 144384256 = 4152^2 + 12016^2 .

It is a super-2 number, since 2×161623360² = 52244220995379200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252217 + ... + 252856.

Almost surely, 2^161623360 is an apocalyptic number.

161623360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161623360 is an abundant number, since it is smaller than the sum of its proper divisors (223243028).

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

161623360 is an equidigital number, since it uses as much as digits as its factorization.

161623360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505090 (or 505080 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 161623360 is about 12713.1176349470. The cubic root of 161623360 is about 544.7133807000.

It can be divided in two parts, 1616 and 23360, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 161623360 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred sixty".