2121641552663 has 8 divisors (see below), whose sum is σ = 2287777798320. Its totient is φ = 1960952397120.

The previous prime is 2121641552629. The next prime is 2121641552669. The reversal of 2121641552663 is 3662551461212.

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 2121641552663 - 2²² = 2121637358359 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 (2121641552669) 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, 1361771720 + ... + 1361773277.

It is an arithmetic number, because the mean of its divisors is an integer number (285972224790).

Almost surely, 2^{2121641552663} is an apocalyptic number.

2121641552663 is a deficient number, since it is larger than the sum of its proper divisors (166136245657).

2121641552663 is a wasteful number, since it uses less digits than its factorization.

2121641552663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723545057.

The product of its digits is 518400, while the sum is 44.

The spelling of 2121641552663 in words is "two trillion, one hundred twenty-one billion, six hundred forty-one million, five hundred fifty-two thousand, six hundred sixty-three".