2516321321647 has 8 divisors (see below), whose sum is σ = 2968563402752. Its totient is φ = 2087271142200.

The previous prime is 2516321321639. The next prime is 2516321321677. The reversal of 2516321321647 is 7461231236152.

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 2516321321647 - 2³ = 2516321321639 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 (2516321321677) 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, 5797975179 + ... + 5797975612.

It is an arithmetic number, because the mean of its divisors is an integer number (371070425344).

Almost surely, 2^{2516321321647} is an apocalyptic number.

2516321321647 is a deficient number, since it is larger than the sum of its proper divisors (452242081105).

2516321321647 is a wasteful number, since it uses less digits than its factorization.

2516321321647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595950829.

The product of its digits is 362880, while the sum is 43.

Adding to 2516321321647 its reverse (7461231236152), we get a palindrome (9977552557799).

The spelling of 2516321321647 in words is "two trillion, five hundred sixteen billion, three hundred twenty-one million, three hundred twenty-one thousand, six hundred forty-seven".