2020977665569 has 2 divisors, whose sum is σ = 2020977665570. Its totient is φ = 2020977665568.

The previous prime is 2020977665561. The next prime is 2020977665587. The reversal of 2020977665569 is 9655667790202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1516148942400 + 504828723169 = 1231320^2 + 710513^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020977665569 - 2³ = 2020977665561 is a prime.

It is a super-2 number, since 2×2020977665569² (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 2020977665569.

It is not a weakly prime, because it can be changed into another prime (2020977665561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010488832784 + 1010488832785.

It is an arithmetic number, because the mean of its divisors is an integer number (1010488832785).

Almost surely, 2^{2020977665569} is an apocalyptic number.

It is an amenable number.

2020977665569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020977665569 is an equidigital number, since it uses as much as digits as its factorization.

2020977665569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85730400, while the sum is 64.

The spelling of 2020977665569 in words is "two trillion, twenty billion, nine hundred seventy-seven million, six hundred sixty-five thousand, five hundred sixty-nine".