2885761180661 has 2 divisors, whose sum is σ = 2885761180662. Its totient is φ = 2885761180660.

The previous prime is 2885761180531. The next prime is 2885761180663. The reversal of 2885761180661 is 1660811675882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2359511044900 + 526250135761 = 1536070^2 + 725431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2885761180661 - 2¹⁸ = 2885760918517 is a prime.

Together with 2885761180663, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2885761180661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2885761180663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1442880590330 + 1442880590331.

It is an arithmetic number, because the mean of its divisors is an integer number (1442880590331).

Almost surely, 2^{2885761180661} is an apocalyptic number.

It is an amenable number.

2885761180661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2885761180661 is an equidigital number, since it uses as much as digits as its factorization.

2885761180661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 2885761180661 in words is "two trillion, eight hundred eighty-five billion, seven hundred sixty-one million, one hundred eighty thousand, six hundred sixty-one".