361661569 has 8 divisors (see below), whose sum is σ = 379340928. Its totient is φ = 344398320.

The previous prime is 361661539. The next prime is 361661579. The reversal of 361661569 is 965166163.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 361661569 - 2⁵ = 361661537 is a prime.

It is a super-2 number, since 2×361661569² = 261598180983083522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361661539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102247 + ... + 105724.

It is an arithmetic number, because the mean of its divisors is an integer number (47417616).

Almost surely, 2^361661569 is an apocalyptic number.

It is an amenable number.

361661569 is a deficient number, since it is larger than the sum of its proper divisors (17679359).

361661569 is a wasteful number, since it uses less digits than its factorization.

361661569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208055.

The product of its digits is 174960, while the sum is 43.

The square root of 361661569 is about 19017.4017415629. The cubic root of 361661569 is about 712.4714302282.

The spelling of 361661569 in words is "three hundred sixty-one million, six hundred sixty-one thousand, five hundred sixty-nine".