1601561163 has 8 divisors (see below), whose sum is σ = 2209050000. Its totient is φ = 1030889888.

The previous prime is 1601561131. The next prime is 1601561189. The reversal of 1601561163 is 3611651061.

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

It is a cyclic number.

It is not a de Polignac number, because 1601561163 - 2⁵ = 1601561131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1601561163.

It is not an unprimeable number, because it can be changed into a prime (1601561263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9204288 + ... + 9204461.

It is an arithmetic number, because the mean of its divisors is an integer number (276131250).

Almost surely, 2^1601561163 is an apocalyptic number.

1601561163 is a deficient number, since it is larger than the sum of its proper divisors (607488837).

1601561163 is a wasteful number, since it uses less digits than its factorization.

1601561163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18408781.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 1601561163 is about 40019.5097796062. The cubic root of 1601561163 is about 1169.9873773202.

The spelling of 1601561163 in words is "one billion, six hundred one million, five hundred sixty-one thousand, one hundred sixty-three".