163860261 has 8 divisors (see below), whose sum is σ = 221557824. Its totient is φ = 107701440.

The previous prime is 163860251. The next prime is 163860269. The reversal of 163860261 is 162068361.

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

It is not a de Polignac number, because 163860261 - 2⁷ = 163860133 is a prime.

It is a super-4 number, since 4×163860261⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163860269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384436 + ... + 384861.

It is an arithmetic number, because the mean of its divisors is an integer number (27694728).

Almost surely, 2^163860261 is an apocalyptic number.

It is an amenable number.

163860261 is a deficient number, since it is larger than the sum of its proper divisors (57697563).

163860261 is an equidigital number, since it uses as much as digits as its factorization.

163860261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769371.

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

The square root of 163860261 is about 12800.7914208458. The cubic root of 163860261 is about 547.2148578810.

The spelling of 163860261 in words is "one hundred sixty-three million, eight hundred sixty thousand, two hundred sixty-one".