1601617771 has 8 divisors (see below), whose sum is σ = 1784296080. Its totient is φ = 1427436192.

The previous prime is 1601617763. The next prime is 1601617783. The reversal of 1601617771 is 1777161061.

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

It is not a de Polignac number, because 1601617771 - 2³ = 1601617763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601617771.

It is not an unprimeable number, because it can be changed into a prime (1601617741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123785 + ... + 2124538.

It is an arithmetic number, because the mean of its divisors is an integer number (223037010).

Almost surely, 2^1601617771 is an apocalyptic number.

1601617771 is a deficient number, since it is larger than the sum of its proper divisors (182678309).

1601617771 is a wasteful number, since it uses less digits than its factorization.

1601617771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248365.

The product of its (nonzero) digits is 12348, while the sum is 37.

The square root of 1601617771 is about 40020.2170283970. The cubic root of 1601617771 is about 1170.0011617589.

The spelling of 1601617771 in words is "one billion, six hundred one million, six hundred seventeen thousand, seven hundred seventy-one".