1601605061 has 4 divisors (see below), whose sum is σ = 1830405792. Its totient is φ = 1372804332.

The previous prime is 1601605043. The next prime is 1601605063. The reversal of 1601605061 is 1605061061.

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 1601605061 - 2¹⁸ = 1601342917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601605061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601605063) 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 3 ways as a sum of consecutive naturals, for example, 114400355 + ... + 114400368.

It is an arithmetic number, because the mean of its divisors is an integer number (457601448).

Almost surely, 2^1601605061 is an apocalyptic number.

It is an amenable number.

1601605061 is a deficient number, since it is larger than the sum of its proper divisors (228800731).

1601605061 is an equidigital number, since it uses as much as digits as its factorization.

1601605061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228800730.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1601605061 is about 40020.0582333409. The cubic root of 1601605061 is about 1169.9980668144.

The spelling of 1601605061 in words is "one billion, six hundred one million, six hundred five thousand, sixty-one".