4521621103663 has 4 divisors (see below), whose sum is σ = 4534216148880. Its totient is φ = 4509026058448.

The previous prime is 4521621103627. The next prime is 4521621103669. The reversal of 4521621103663 is 3663011261254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4521621103663 - 2⁹ = 4521621103151 is a prime.

It is a super-3 number, since 3×4521621103663³ (a number of 39 digits) contains 333 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 (4521621103669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6297522070 + ... + 6297522787.

It is an arithmetic number, because the mean of its divisors is an integer number (1133554037220).

Almost surely, 2^{4521621103663} is an apocalyptic number.

4521621103663 is a deficient number, since it is larger than the sum of its proper divisors (12595045217).

4521621103663 is a wasteful number, since it uses less digits than its factorization.

4521621103663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12595045216.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 4521621103663 in words is "four trillion, five hundred twenty-one billion, six hundred twenty-one million, one hundred three thousand, six hundred sixty-three".