2177801269489 has 2 divisors, whose sum is σ = 2177801269490. Its totient is φ = 2177801269488.

The previous prime is 2177801269487. The next prime is 2177801269613. The reversal of 2177801269489 is 9849621087712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2040349414464 + 137451855025 = 1428408^2 + 370745^2 .

It is a cyclic number.

It is not a de Polignac number, because 2177801269489 - 2¹ = 2177801269487 is a prime.

It is a super-2 number, since 2×2177801269489² (a number of 25 digits) contains 22 as substring.

Together with 2177801269487, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2177801269489.

It is not a weakly prime, because it can be changed into another prime (2177801269487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1088900634744 + 1088900634745.

It is an arithmetic number, because the mean of its divisors is an integer number (1088900634745).

Almost surely, 2^{2177801269489} is an apocalyptic number.

It is an amenable number.

2177801269489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2177801269489 is an equidigital number, since it uses as much as digits as its factorization.

2177801269489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The spelling of 2177801269489 in words is "two trillion, one hundred seventy-seven billion, eight hundred one million, two hundred sixty-nine thousand, four hundred eighty-nine".