163620861 has 8 divisors (see below), whose sum is σ = 220410624. Its totient is φ = 107955840.

The previous prime is 163620851. The next prime is 163620887. The reversal of 163620861 is 168026361.

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

It is not a de Polignac number, because 163620861 - 2⁶ = 163620797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163620851) 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, 280845 + ... + 281426.

It is an arithmetic number, because the mean of its divisors is an integer number (27551328).

Almost surely, 2^163620861 is an apocalyptic number.

It is an amenable number.

163620861 is a deficient number, since it is larger than the sum of its proper divisors (56789763).

163620861 is an equidigital number, since it uses as much as digits as its factorization.

163620861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562371.

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

The square root of 163620861 is about 12791.4370185683. The cubic root of 163620861 is about 546.9482341805.

The spelling of 163620861 in words is "one hundred sixty-three million, six hundred twenty thousand, eight hundred sixty-one".