366561226249 has 3 divisors (see below), whose sum is σ = 366561831693. Its totient is φ = 366560620806.

The previous prime is 366561226243. The next prime is 366561226267. The reversal of 366561226249 is 942622165663.

The square root of 366561226249 is 605443.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 942622165663 = 919417 ⋅1025239.

It is not a de Polignac number, because 366561226249 - 2⁵ = 366561226217 is a prime.

It is a super-2 number, since 2×366561226249² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 366561226196 and 366561226205.

It is not an unprimeable number, because it can be changed into a prime (366561226243) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 302722 + ... + 908164.

It is an arithmetic number, because the mean of its divisors is an integer number (122187277231).

Almost surely, 2^366561226249 is an apocalyptic number.

366561226249 is the 605443-rd square number.

366561226249 is the 302722-nd centered octagonal number.

It is an amenable number.

366561226249 is a deficient number, since it is larger than the sum of its proper divisors (605444).

366561226249 is an frugal number, since it uses more digits than its factorization.

366561226249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210886 (or 605443 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 52.

The spelling of 366561226249 in words is "three hundred sixty-six billion, five hundred sixty-one million, two hundred twenty-six thousand, two hundred forty-nine".