16451506620071 has 4 divisors (see below), whose sum is σ = 16451573810712. Its totient is φ = 16451439429432.

The previous prime is 16451506620067. The next prime is 16451506620103. The reversal of 16451506620071 is 17002660515461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16451506620071 - 2² = 16451506620067 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 (16451506650071) 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, 33226700 + ... + 33718193.

It is an arithmetic number, because the mean of its divisors is an integer number (4112893452678).

Almost surely, 2^{16451506620071} is an apocalyptic number.

16451506620071 is a deficient number, since it is larger than the sum of its proper divisors (67190641).

16451506620071 is an equidigital number, since it uses as much as digits as its factorization.

16451506620071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67190640.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 16451506620071 in words is "sixteen trillion, four hundred fifty-one billion, five hundred six million, six hundred twenty thousand, seventy-one".