161280663 has 8 divisors (see below), whose sum is σ = 215419776. Its totient is φ = 107331000.

The previous prime is 161280617. The next prime is 161280667. The reversal of 161280663 is 366082161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161280663 - 2⁶ = 161280599 is a prime.

It is a super-2 number, since 2×161280663² = 52022904515439138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161280667) 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, 45363 + ... + 48788.

It is an arithmetic number, because the mean of its divisors is an integer number (26927472).

Almost surely, 2^161280663 is an apocalyptic number.

161280663 is a deficient number, since it is larger than the sum of its proper divisors (54139113).

161280663 is an equidigital number, since it uses as much as digits as its factorization.

161280663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94725.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 161280663 is about 12699.6323962546. The cubic root of 161280663 is about 544.3281151603.

The spelling of 161280663 in words is "one hundred sixty-one million, two hundred eighty thousand, six hundred sixty-three".