361561311 has 12 divisors (see below), whose sum is σ = 544962288. Its totient is φ = 230560704.

The previous prime is 361561307. The next prime is 361561313. The reversal of 361561311 is 113165163.

361561311 is a `hidden beast` number, since 36 + 1 + 5 + 613 + 11 = 666.

It is not a de Polignac number, because 361561311 - 2² = 361561307 is a prime.

It is a super-2 number, since 2×361561311² = 261453163224077442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361561313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873130 + ... + 873543.

It is an arithmetic number, because the mean of its divisors is an integer number (45413524).

Almost surely, 2^361561311 is an apocalyptic number.

361561311 is a deficient number, since it is larger than the sum of its proper divisors (183400977).

361561311 is a wasteful number, since it uses less digits than its factorization.

361561311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746702 (or 1746699 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 361561311 is about 19014.7656046558. The cubic root of 361561311 is about 712.4055882290.

The spelling of 361561311 in words is "three hundred sixty-one million, five hundred sixty-one thousand, three hundred eleven".