163161554 has 4 divisors (see below), whose sum is σ = 244742334. Its totient is φ = 81580776.

The previous prime is 163161553. The next prime is 163161571. The reversal of 163161554 is 455161361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138886225 + 24275329 = 11785^2 + 4927^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 163161554.

It is not an unprimeable number, because it can be changed into a prime (163161553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40790387 + ... + 40790390.

Almost surely, 2^163161554 is an apocalyptic number.

163161554 is a deficient number, since it is larger than the sum of its proper divisors (81580780).

163161554 is an equidigital number, since it uses as much as digits as its factorization.

163161554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81580779.

The product of its digits is 10800, while the sum is 32.

The square root of 163161554 is about 12773.4707108131. The cubic root of 163161554 is about 546.4359674158.

The spelling of 163161554 in words is "one hundred sixty-three million, one hundred sixty-one thousand, five hundred fifty-four".