1611409061 has 4 divisors (see below), whose sum is σ = 1630823712. Its totient is φ = 1591994412.

The previous prime is 1611409043. The next prime is 1611409087. The reversal of 1611409061 is 1609041161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1611409061 - 2¹⁸ = 1611146917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611409031) 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 3 ways as a sum of consecutive naturals, for example, 9707201 + ... + 9707366.

It is an arithmetic number, because the mean of its divisors is an integer number (407705928).

Almost surely, 2^1611409061 is an apocalyptic number.

It is an amenable number.

1611409061 is a deficient number, since it is larger than the sum of its proper divisors (19414651).

1611409061 is an equidigital number, since it uses as much as digits as its factorization.

1611409061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19414650.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1611409061 is about 40142.3599331180. The cubic root of 1611409061 is about 1172.3805382598.

The spelling of 1611409061 in words is "one billion, six hundred eleven million, four hundred nine thousand, sixty-one".