2164544317631 has 8 divisors (see below), whose sum is σ = 2165542382640. Its totient is φ = 2163546470592.

The previous prime is 2164544317613. The next prime is 2164544317643. The reversal of 2164544317631 is 1367134454612.

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 a de Polignac number, because none of the positive numbers 2^k-2164544317631 is a prime.

It is a super-2 number, since 2×2164544317631² (a number of 25 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 (2164544377631) 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, 21783860 + ... + 21882998.

It is an arithmetic number, because the mean of its divisors is an integer number (270692797830).

Almost surely, 2^{2164544317631} is an apocalyptic number.

2164544317631 is a deficient number, since it is larger than the sum of its proper divisors (998065009).

2164544317631 is an equidigital number, since it uses as much as digits as its factorization.

2164544317631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108985.

The product of its digits is 1451520, while the sum is 47.

The spelling of 2164544317631 in words is "two trillion, one hundred sixty-four billion, five hundred forty-four million, three hundred seventeen thousand, six hundred thirty-one".