361722361 has 81 divisors (see below), whose sum is σ = 528570063. Its totient is φ = 246486240.

The previous prime is 361722349. The next prime is 361722367. The reversal of 361722361 is 163227163.

The square root of 361722361 is 19019.

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

It can be written as a sum of positive squares in only one way, i.e., 53509225 + 308213136 = 7315^2 + 17556^2 .

It is not a de Polignac number, because 361722361 - 2⁷ = 361722233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (361722367) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 19038010 + ... + 19038028.

Almost surely, 2^361722361 is an apocalyptic number.

361722361 is the 19019-th square number.

361722361 is the 9510-th centered octagonal number.

It is an amenable number.

361722361 is a deficient number, since it is larger than the sum of its proper divisors (166847702).

361722361 is a wasteful number, since it uses less digits than its factorization.

361722361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 50 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The cubic root of 361722361 is about 712.5113479674.

The spelling of 361722361 in words is "three hundred sixty-one million, seven hundred twenty-two thousand, three hundred sixty-one".