16641642131551 has 8 divisors (see below), whose sum is σ = 16657078727520. Its totient is φ = 16626209625312.

The previous prime is 16641642131507. The next prime is 16641642131563. The reversal of 16641642131551 is 15513124614661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16641642131551 - 2⁷ = 16641642131423 is a prime.

It is a super-2 number, since 2×16641642131551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641642131501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7149861 + ... + 9187153.

It is an arithmetic number, because the mean of its divisors is an integer number (2082134840940).

Almost surely, 2^{16641642131551} is an apocalyptic number.

16641642131551 is a deficient number, since it is larger than the sum of its proper divisors (15436595969).

16641642131551 is a wasteful number, since it uses less digits than its factorization.

16641642131551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044865.

The product of its digits is 518400, while the sum is 46.

The spelling of 16641642131551 in words is "sixteen trillion, six hundred forty-one billion, six hundred forty-two million, one hundred thirty-one thousand, five hundred fifty-one".