16043122491 has 16 divisors (see below), whose sum is σ = 23456369280. Its totient is φ = 9672721920.

The previous prime is 16043122481. The next prime is 16043122507. The reversal of 16043122491 is 19422134061.

It is a de Polignac number, because none of the positive numbers 2^k-16043122491 is a prime.

It is a super-2 number, since 2×16043122491² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (16043122471) 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 15 ways as a sum of consecutive naturals, for example, 1253101 + ... + 1265838.

It is an arithmetic number, because the mean of its divisors is an integer number (1466023080).

Almost surely, 2^16043122491 is an apocalyptic number.

16043122491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16043122491 is a deficient number, since it is larger than the sum of its proper divisors (7413246789).

16043122491 is a wasteful number, since it uses less digits than its factorization.

16043122491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519146.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 16043122491 in words is "sixteen billion, forty-three million, one hundred twenty-two thousand, four hundred ninety-one".