4221365758644 has 24 divisors (see below), whose sum is σ = 9859997494368. Its totient is φ = 1405672768480.

The previous prime is 4221365758633. The next prime is 4221365758651. The reversal of 4221365758644 is 4468575631224.

It is a happy number.

It is a congruent 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, 181131747 + ... + 181155050.

It is an arithmetic number, because the mean of its divisors is an integer number (410833228932).

Almost surely, 2^{4221365758644} is an apocalyptic number.

It is an amenable number.

4221365758644 is an abundant number, since it is smaller than the sum of its proper divisors (5638631735724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221365758644 is a wasteful number, since it uses less digits than its factorization.

4221365758644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362287775 (or 362287773 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 57.

The spelling of 4221365758644 in words is "four trillion, two hundred twenty-one billion, three hundred sixty-five million, seven hundred fifty-eight thousand, six hundred forty-four".