722204136308621 has 2 divisors, whose sum is σ = 722204136308622. Its totient is φ = 722204136308620.

The previous prime is 722204136308581. The next prime is 722204136308741. The reversal of 722204136308621 is 126803631402227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623954687437225 + 98249448871396 = 24979085^2 + 9912086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722204136308621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722204136308321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361102068154310 + 361102068154311.

It is an arithmetic number, because the mean of its divisors is an integer number (361102068154311).

Almost surely, 2^{722204136308621} is an apocalyptic number.

It is an amenable number.

722204136308621 is a deficient number, since it is larger than the sum of its proper divisors (1).

722204136308621 is an equidigital number, since it uses as much as digits as its factorization.

722204136308621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 722204136308621 in words is "seven hundred twenty-two trillion, two hundred four billion, one hundred thirty-six million, three hundred eight thousand, six hundred twenty-one".