2771648214661 has 2 divisors, whose sum is σ = 2771648214662. Its totient is φ = 2771648214660.

The previous prime is 2771648214611. The next prime is 2771648214679. The reversal of 2771648214661 is 1664128461772.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1417275964036 + 1354372250625 = 1190494^2 + 1163775^2 .

It is a cyclic number.

It is not a de Polignac number, because 2771648214661 - 2³¹ = 2769500731013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2771648214611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385824107330 + 1385824107331.

It is an arithmetic number, because the mean of its divisors is an integer number (1385824107331).

Almost surely, 2^{2771648214661} is an apocalyptic number.

It is an amenable number.

2771648214661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2771648214661 is an equidigital number, since it uses as much as digits as its factorization.

2771648214661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 55.

The spelling of 2771648214661 in words is "two trillion, seven hundred seventy-one billion, six hundred forty-eight million, two hundred fourteen thousand, six hundred sixty-one".