16721071074731 has 8 divisors (see below), whose sum is σ = 17344315842480. Its totient is φ = 16108480063872.

The previous prime is 16721071074727. The next prime is 16721071074733. The reversal of 16721071074731 is 13747017012761.

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

It is not a de Polignac number, because 16721071074731 - 2² = 16721071074727 is a prime.

It is a super-3 number, since 3×16721071074731³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16721071074733) 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 7 ways as a sum of consecutive naturals, for example, 2663436026 + ... + 2663442303.

It is an arithmetic number, because the mean of its divisors is an integer number (2168039480310).

Almost surely, 2^{16721071074731} is an apocalyptic number.

16721071074731 is a deficient number, since it is larger than the sum of its proper divisors (623244767749).

16721071074731 is an equidigital number, since it uses as much as digits as its factorization.

16721071074731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326878445.

The product of its (nonzero) digits is 345744, while the sum is 47.

The spelling of 16721071074731 in words is "sixteen trillion, seven hundred twenty-one billion, seventy-one million, seventy-four thousand, seven hundred thirty-one".