2646251116721 has 8 divisors (see below), whose sum is σ = 2649358145280. Its totient is φ = 2643145144992.

The previous prime is 2646251116699. The next prime is 2646251116723. The reversal of 2646251116721 is 1276111526462.

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-2646251116721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2646251116723) 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, 4803560 + ... + 5326038.

It is an arithmetic number, because the mean of its divisors is an integer number (331169768160).

Almost surely, 2^{2646251116721} is an apocalyptic number.

It is an amenable number.

2646251116721 is a deficient number, since it is larger than the sum of its proper divisors (3107028559).

2646251116721 is a wasteful number, since it uses less digits than its factorization.

2646251116721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528415.

The product of its digits is 241920, while the sum is 44.

The spelling of 2646251116721 in words is "two trillion, six hundred forty-six billion, two hundred fifty-one million, one hundred sixteen thousand, seven hundred twenty-one".