16429549266991 has 4 divisors (see below), whose sum is σ = 18776627733712. Its totient is φ = 14082470800272.

The previous prime is 16429549266941. The next prime is 16429549267003. The reversal of 16429549266991 is 19966294592461.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16429549266991 - 2¹¹ = 16429549264943 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 (16429549266941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173539233350 + ... + 1173539233363.

It is an arithmetic number, because the mean of its divisors is an integer number (4694156933428).

Almost surely, 2^{16429549266991} is an apocalyptic number.

16429549266991 is a deficient number, since it is larger than the sum of its proper divisors (2347078466721).

16429549266991 is an equidigital number, since it uses as much as digits as its factorization.

16429549266991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347078466720.

The product of its digits is 453496320, while the sum is 73.

The spelling of 16429549266991 in words is "sixteen trillion, four hundred twenty-nine billion, five hundred forty-nine million, two hundred sixty-six thousand, nine hundred ninety-one".