2557800077881 has 2 divisors, whose sum is σ = 2557800077882. Its totient is φ = 2557800077880.

The previous prime is 2557800077827. The next prime is 2557800077933. The reversal of 2557800077881 is 1887700087552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2543119120656 + 14680957225 = 1594716^2 + 121165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557800077881 - 2¹¹ = 2557800075833 is a prime.

It is a super-2 number, since 2×2557800077881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2557800077681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278900038940 + 1278900038941.

It is an arithmetic number, because the mean of its divisors is an integer number (1278900038941).

Almost surely, 2^{2557800077881} is an apocalyptic number.

It is an amenable number.

2557800077881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557800077881 is an equidigital number, since it uses as much as digits as its factorization.

2557800077881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8780800, while the sum is 58.

The spelling of 2557800077881 in words is "two trillion, five hundred fifty-seven billion, eight hundred million, seventy-seven thousand, eight hundred eighty-one".