1601187117 has 16 divisors (see below), whose sum is σ = 2184229632. Its totient is φ = 1042882560.

The previous prime is 1601187103. The next prime is 1601187127. The reversal of 1601187117 is 7117811061.

It is a happy number.

It is not a de Polignac number, because 1601187117 - 2¹⁵ = 1601154349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601187127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71517 + ... + 91197.

It is an arithmetic number, because the mean of its divisors is an integer number (136514352).

Almost surely, 2^1601187117 is an apocalyptic number.

It is an amenable number.

1601187117 is a deficient number, since it is larger than the sum of its proper divisors (583042515).

1601187117 is a wasteful number, since it uses less digits than its factorization.

1601187117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20308.

The product of its (nonzero) digits is 2352, while the sum is 33.

The square root of 1601187117 is about 40014.8362110855. The cubic root of 1601187117 is about 1169.8962863725.

Adding to 1601187117 its reverse (7117811061), we get a palindrome (8718998178).

The spelling of 1601187117 in words is "one billion, six hundred one million, one hundred eighty-seven thousand, one hundred seventeen".