2061035561 has 4 divisors (see below), whose sum is σ = 2219576772. Its totient is φ = 1902494352.

The previous prime is 2061035521. The next prime is 2061035569. The reversal of 2061035561 is 1655301602.

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 939790336 + 1121245225 = 30656^2 + 33485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061035561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2061035569) 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, 79270586 + ... + 79270611.

It is an arithmetic number, because the mean of its divisors is an integer number (554894193).

Almost surely, 2^2061035561 is an apocalyptic number.

It is an amenable number.

2061035561 is a deficient number, since it is larger than the sum of its proper divisors (158541211).

2061035561 is a wasteful number, since it uses less digits than its factorization.

2061035561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158541210.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 2061035561 is about 45398.6295057461. The cubic root of 2061035561 is about 1272.6095023510.

The spelling of 2061035561 in words is "two billion, sixty-one million, thirty-five thousand, five hundred sixty-one".