2122551663665 has 8 divisors (see below), whose sum is σ = 2601254805120. Its totient is φ = 1661912791792.

The previous prime is 2122551663649. The next prime is 2122551663677. The reversal of 2122551663665 is 5663661552212.

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 2122551663665 - 2⁴ = 2122551663649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4516067135 + ... + 4516067604.

It is an arithmetic number, because the mean of its divisors is an integer number (325156850640).

Almost surely, 2^{2122551663665} is an apocalyptic number.

It is an amenable number.

2122551663665 is a deficient number, since it is larger than the sum of its proper divisors (478703141455).

2122551663665 is an equidigital number, since it uses as much as digits as its factorization.

2122551663665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032134791.

The product of its digits is 3888000, while the sum is 50.

The spelling of 2122551663665 in words is "two trillion, one hundred twenty-two billion, five hundred fifty-one million, six hundred sixty-three thousand, six hundred sixty-five".