2154662620771 has 2 divisors, whose sum is σ = 2154662620772. Its totient is φ = 2154662620770.

The previous prime is 2154662620741. The next prime is 2154662620801. The reversal of 2154662620771 is 1770262664512.

It is a balanced prime because it is at equal distance from previous prime (2154662620741) and next prime (2154662620801).

It is a cyclic number.

It is not a de Polignac number, because 2154662620771 - 2¹¹ = 2154662618723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154662620741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077331310385 + 1077331310386.

It is an arithmetic number, because the mean of its divisors is an integer number (1077331310386).

Almost surely, 2^{2154662620771} is an apocalyptic number.

2154662620771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154662620771 is an equidigital number, since it uses as much as digits as its factorization.

2154662620771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 2154662620771 in words is "two trillion, one hundred fifty-four billion, six hundred sixty-two million, six hundred twenty thousand, seven hundred seventy-one".