2961427561 has 3 divisors (see below), whose sum is σ = 2961481981. Its totient is φ = 2961373142.

The previous prime is 2961427531. The next prime is 2961427577. The reversal of 2961427561 is 1657241692.

The square root of 2961427561 is 54419.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2961427561 - 2¹³ = 2961419369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2961427531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27210 + ... + 81628.

Almost surely, 2^2961427561 is an apocalyptic number.

2961427561 is the 54419-th square number.

2961427561 is the 27210-th centered octagonal number.

It is an amenable number.

2961427561 is a deficient number, since it is larger than the sum of its proper divisors (54420).

2961427561 is an frugal number, since it uses more digits than its factorization.

2961427561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108838 (or 54419 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The cubic root of 2961427561 is about 1436.0416562443.

It can be divided in two parts, 29614 and 27561, that added together give a palindrome (57175).

The spelling of 2961427561 in words is "two billion, nine hundred sixty-one million, four hundred twenty-seven thousand, five hundred sixty-one".