190006561 has 4 divisors (see below), whose sum is σ = 190125972. Its totient is φ = 189887152.

The previous prime is 190006549. The next prime is 190006577. The reversal of 190006561 is 165600091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136072225 + 53934336 = 11665^2 + 7344^2 .

It is a cyclic number.

It is not a de Polignac number, because 190006561 - 2⁵ = 190006529 is a prime.

It is a super-2 number, since 2×190006561² = 72204986446093442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190006541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57286 + ... + 60511.

It is an arithmetic number, because the mean of its divisors is an integer number (47531493).

Almost surely, 2^190006561 is an apocalyptic number.

It is an amenable number.

190006561 is a deficient number, since it is larger than the sum of its proper divisors (119411).

190006561 is a wasteful number, since it uses less digits than its factorization.

190006561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119410.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 190006561 is about 13784.2867425195. The cubic root of 190006561 is about 574.8963251014.

The spelling of 190006561 in words is "one hundred ninety million, six thousand, five hundred sixty-one".