16449811894461 has 16 divisors (see below), whose sum is σ = 24020100295488. Its totient is φ = 9930790809600.

The previous prime is 16449811894409. The next prime is 16449811894493.

16449811894461 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-16449811894461 is a prime.

It is a super-2 number, since 2×16449811894461² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16449811894392 and 16449811894401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16449811894261) 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, 969795310 + ... + 969812271.

It is an arithmetic number, because the mean of its divisors is an integer number (1501256268468).

Almost surely, 2^{16449811894461} is an apocalyptic number.

16449811894461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16449811894461 is a deficient number, since it is larger than the sum of its proper divisors (7570288401027).

16449811894461 is a wasteful number, since it uses less digits than its factorization.

16449811894461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939607852.

The product of its digits is 47775744, while the sum is 66.

The spelling of 16449811894461 in words is "sixteen trillion, four hundred forty-nine billion, eight hundred eleven million, eight hundred ninety-four thousand, four hundred sixty-one".