1771462976849 has 2 divisors, whose sum is σ = 1771462976850. Its totient is φ = 1771462976848.

The previous prime is 1771462976839. The next prime is 1771462976869. The reversal of 1771462976849 is 9486792641771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1592500135249 + 178962841600 = 1261943^2 + 423040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1771462976849 - 2²⁰ = 1771461928273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1771462976839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 885731488424 + 885731488425.

It is an arithmetic number, because the mean of its divisors is an integer number (885731488425).

Almost surely, 2^{1771462976849} is an apocalyptic number.

It is an amenable number.

1771462976849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1771462976849 is an equidigital number, since it uses as much as digits as its factorization.

1771462976849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 71.

The spelling of 1771462976849 in words is "one trillion, seven hundred seventy-one billion, four hundred sixty-two million, nine hundred seventy-six thousand, eight hundred forty-nine".