4221621620787 has 8 divisors (see below), whose sum is σ = 5629377113536. Its totient is φ = 2814140270952.

The previous prime is 4221621620779. The next prime is 4221621620803. The reversal of 4221621620787 is 7870261261224.

4221621620787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4221621620787 - 2³ = 4221621620779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221621220787) 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, 68499793 + ... + 68561394.

It is an arithmetic number, because the mean of its divisors is an integer number (703672139192).

Almost surely, 2^{4221621620787} is an apocalyptic number.

4221621620787 is a deficient number, since it is larger than the sum of its proper divisors (1407755492749).

4221621620787 is a wasteful number, since it uses less digits than its factorization.

4221621620787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137071457.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 4221621620787 in words is "four trillion, two hundred twenty-one billion, six hundred twenty-one million, six hundred twenty thousand, seven hundred eighty-seven".