1961814186 has 24 divisors (see below), whose sum is σ = 4330799460. Its totient is φ = 641599296.

The previous prime is 1961814167. The next prime is 1961814223. The reversal of 1961814186 is 6814181691.

It is a happy number.

1961814186 is a `hidden beast` number, since 1 + 9 + 618 + 14 + 18 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1943487225 + 18326961 = 44085^2 + 4281^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1027251 + ... + 1029158.

Almost surely, 2^1961814186 is an apocalyptic number.

1961814186 is an abundant number, since it is smaller than the sum of its proper divisors (2368985274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961814186 is a wasteful number, since it uses less digits than its factorization.

1961814186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056470 (or 2056467 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1961814186 is about 44292.3716456909. The cubic root of 1961814186 is about 1251.8509508453.

The spelling of 1961814186 in words is "one billion, nine hundred sixty-one million, eight hundred fourteen thousand, one hundred eighty-six".