622222793721 has 9 divisors (see below), whose sum is σ = 898769675791. Its totient is φ = 414813618192.

The previous prime is 622222793671. The next prime is 622222793761. The reversal of 622222793721 is 127397222226.

The square root of 622222793721 is 788811.

It is a perfect power (a square), and thus also a powerful number.

622222793721 is a `hidden beast` number, since 6 + 2 + 2 + 2 + 2 + 279 + 372 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 186274244025 + 435948549696 = 431595^2 + 660264^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-622222793721 is a prime.

It is a super-2 number, since 2×622222793721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (622222793761) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2234965 + ... + 2497901.

Almost surely, 2^622222793721 is an apocalyptic number.

622222793721 is the 788811-st square number.

622222793721 is the 394406-th centered octagonal number.

It is an amenable number.

622222793721 is a deficient number, since it is larger than the sum of its proper divisors (276546882070).

622222793721 is an frugal number, since it uses more digits than its factorization.

622222793721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525880 (or 262940 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 622222793721 in words is "six hundred twenty-two billion, two hundred twenty-two million, seven hundred ninety-three thousand, seven hundred twenty-one".