2077798098569 has 2 divisors, whose sum is σ = 2077798098570. Its totient is φ = 2077798098568.

The previous prime is 2077798098553. The next prime is 2077798098581. The reversal of 2077798098569 is 9658908977702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1786940665225 + 290857433344 = 1336765^2 + 539312^2 .

It is a cyclic number.

It is not a de Polignac number, because 2077798098569 - 2⁴ = 2077798098553 is a prime.

It is a super-2 number, since 2×2077798098569² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2077798098569.

It is not a weakly prime, because it can be changed into another prime (2077798098169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1038899049284 + 1038899049285.

It is an arithmetic number, because the mean of its divisors is an integer number (1038899049285).

Almost surely, 2^{2077798098569} is an apocalyptic number.

It is an amenable number.

2077798098569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2077798098569 is an equidigital number, since it uses as much as digits as its factorization.

2077798098569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960180480, while the sum is 77.

The spelling of 2077798098569 in words is "two trillion, seventy-seven billion, seven hundred ninety-eight million, ninety-eight thousand, five hundred sixty-nine".