163055890 has 16 divisors (see below), whose sum is σ = 297882432. Its totient is φ = 64248624.

The previous prime is 163055887. The next prime is 163055897. The reversal of 163055890 is 98550361.

It is not an unprimeable number, because it can be changed into a prime (163055897) 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, 121014 + ... + 122353.

It is an arithmetic number, because the mean of its divisors is an integer number (18617652).

Almost surely, 2^163055890 is an apocalyptic number.

163055890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163055890 is a deficient number, since it is larger than the sum of its proper divisors (134826542).

163055890 is a wasteful number, since it uses less digits than its factorization.

163055890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243441.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 163055890 is about 12769.3339685357. Note that the first 3 decimals coincide. The cubic root of 163055890 is about 546.3179839877.

The spelling of 163055890 in words is "one hundred sixty-three million, fifty-five thousand, eight hundred ninety".