1601662117 has 6 divisors (see below), whose sum is σ = 1760504774. Its totient is φ = 1456056360.

The previous prime is 1601662103. The next prime is 1601662147. The reversal of 1601662117 is 7112661061.

It can be written as a sum of positive squares in only one way, i.e., 1139670081 + 461992036 = 33759^2 + 21494^2 .

It is not a de Polignac number, because 1601662117 - 2¹⁵ = 1601629349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601662147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6618318 + ... + 6618559.

Almost surely, 2^1601662117 is an apocalyptic number.

It is an amenable number.

1601662117 is a deficient number, since it is larger than the sum of its proper divisors (158842657).

1601662117 is a wasteful number, since it uses less digits than its factorization.

1601662117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13236899 (or 13236888 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1601662117 is about 40020.7710695334. The cubic root of 1601662117 is about 1170.0119600891.

The spelling of 1601662117 in words is "one billion, six hundred one million, six hundred sixty-two thousand, one hundred seventeen".