2561077061 has 4 divisors (see below), whose sum is σ = 2563473900. Its totient is φ = 2558680224.

The previous prime is 2561077049. The next prime is 2561077067. The reversal of 2561077061 is 1607701652.

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 1071580225 + 1489496836 = 32735^2 + 38594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561077061 is a prime.

It is a super-3 number, since 3×2561077061³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561077067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196816 + ... + 1198953.

It is an arithmetic number, because the mean of its divisors is an integer number (640868475).

Almost surely, 2^2561077061 is an apocalyptic number.

It is an amenable number.

2561077061 is a deficient number, since it is larger than the sum of its proper divisors (2396839).

2561077061 is a wasteful number, since it uses less digits than its factorization.

2561077061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396838.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 2561077061 is about 50607.0850869718. The cubic root of 2561077061 is about 1368.1725792343.

The spelling of 2561077061 in words is "two billion, five hundred sixty-one million, seventy-seven thousand, sixty-one".