2777800255481 has 2 divisors, whose sum is σ = 2777800255482. Its totient is φ = 2777800255480.

The previous prime is 2777800255469. The next prime is 2777800255507. The reversal of 2777800255481 is 1845520087772.

2777800255481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2731800729856 + 45999525625 = 1652816^2 + 214475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2777800255481 is a prime.

It is a super-2 number, since 2×2777800255481² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2777800255411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388900127740 + 1388900127741.

It is an arithmetic number, because the mean of its divisors is an integer number (1388900127741).

Almost surely, 2^{2777800255481} is an apocalyptic number.

It is an amenable number.

2777800255481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2777800255481 is an equidigital number, since it uses as much as digits as its factorization.

2777800255481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8780800, while the sum is 56.

The spelling of 2777800255481 in words is "two trillion, seven hundred seventy-seven billion, eight hundred million, two hundred fifty-five thousand, four hundred eighty-one".