2857781653877 has 2 divisors, whose sum is σ = 2857781653878. Its totient is φ = 2857781653876.

The previous prime is 2857781653789. The next prime is 2857781653933. The reversal of 2857781653877 is 7783561877582.

2857781653877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2243072340721 + 614709313156 = 1497689^2 + 784034^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857781653877 - 2²⁰ = 2857780605301 is a prime.

It is a super-2 number, since 2×2857781653877² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857781653277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428890826938 + 1428890826939.

It is an arithmetic number, because the mean of its divisors is an integer number (1428890826939).

Almost surely, 2^{2857781653877} is an apocalyptic number.

It is an amenable number.

2857781653877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857781653877 is an equidigital number, since it uses as much as digits as its factorization.

2857781653877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1106380800, while the sum is 74.

The spelling of 2857781653877 in words is "two trillion, eight hundred fifty-seven billion, seven hundred eighty-one million, six hundred fifty-three thousand, eight hundred seventy-seven".