2170918766473 has 2 divisors, whose sum is σ = 2170918766474. Its totient is φ = 2170918766472.

The previous prime is 2170918766431. The next prime is 2170918766509. The reversal of 2170918766473 is 3746678190712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2146951701504 + 23967064969 = 1465248^2 + 154813^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170918766473 - 2²¹ = 2170916669321 is a prime.

It is not a weakly prime, because it can be changed into another prime (2170918766413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085459383236 + 1085459383237.

It is an arithmetic number, because the mean of its divisors is an integer number (1085459383237).

Almost surely, 2^{2170918766473} is an apocalyptic number.

It is an amenable number.

2170918766473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170918766473 is an equidigital number, since it uses as much as digits as its factorization.

2170918766473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 2170918766473 in words is "two trillion, one hundred seventy billion, nine hundred eighteen million, seven hundred sixty-six thousand, four hundred seventy-three".