16601161511 has 8 divisors (see below), whose sum is σ = 18111404304. Its totient is φ = 15091093120.

The previous prime is 16601161439. The next prime is 16601161519. The reversal of 16601161511 is 11516110661.

It is a happy number.

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 16601161511 - 2²² = 16596967207 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 (16601161519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230255 + ... + 293631.

It is an arithmetic number, because the mean of its divisors is an integer number (2263925538).

Almost surely, 2^16601161511 is an apocalyptic number.

16601161511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16601161511 is a deficient number, since it is larger than the sum of its proper divisors (1510242793).

16601161511 is a wasteful number, since it uses less digits than its factorization.

16601161511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87201.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 16601161511 in words is "sixteen billion, six hundred one million, one hundred sixty-one thousand, five hundred eleven".