16161051511 has 8 divisors (see below), whose sum is σ = 17804796048. Its totient is φ = 14546400000.

The previous prime is 16161051503. The next prime is 16161051523. The reversal of 16161051511 is 11515016161.

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

It is not a de Polignac number, because 16161051511 - 2³ = 16161051503 is a prime.

It is a super-2 number, since 2×16161051511² (a number of 21 digits) contains 22 as substring.

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 16161051511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161051541) 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, 7272090 + ... + 7274311.

It is an arithmetic number, because the mean of its divisors is an integer number (2225599506).

Almost surely, 2^16161051511 is an apocalyptic number.

16161051511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16161051511 is a deficient number, since it is larger than the sum of its proper divisors (1643744537).

16161051511 is a wasteful number, since it uses less digits than its factorization.

16161051511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14546513.

The product of its (nonzero) digits is 900, while the sum is 28.

Adding to 16161051511 its reverse (11515016161), we get a palindrome (27676067672).

The spelling of 16161051511 in words is "sixteen billion, one hundred sixty-one million, fifty-one thousand, five hundred eleven".