2605961771 has 8 divisors (see below), whose sum is σ = 2978552544. Its totient is φ = 2233448640.

The previous prime is 2605961759. The next prime is 2605961791. The reversal of 2605961771 is 1771695062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2605961771 - 2¹⁸ = 2605699627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2605961731) 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 7 ways as a sum of consecutive naturals, for example, 110501 + ... + 131993.

It is an arithmetic number, because the mean of its divisors is an integer number (372319068).

Almost surely, 2^2605961771 is an apocalyptic number.

2605961771 is a deficient number, since it is larger than the sum of its proper divisors (372590773).

2605961771 is a wasteful number, since it uses less digits than its factorization.

2605961771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38821.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 2605961771 is about 51048.6216366319. The cubic root of 2605961771 is about 1376.1190706393.

The spelling of 2605961771 in words is "two billion, six hundred five million, nine hundred sixty-one thousand, seven hundred seventy-one".