11000077776781 has 2 divisors, whose sum is σ = 11000077776782. Its totient is φ = 11000077776780.

The previous prime is 11000077776773. The next prime is 11000077776791. The reversal of 11000077776781 is 18767777000011.

11000077776781 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., 9509261196681 + 1490816580100 = 3083709^2 + 1220990^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000077776781 - 2³ = 11000077776773 is a prime.

It is a super-2 number, since 2×11000077776781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000077776791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500038888390 + 5500038888391.

It is an arithmetic number, because the mean of its divisors is an integer number (5500038888391).

Almost surely, 2^{11000077776781} is an apocalyptic number.

It is an amenable number.

11000077776781 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000077776781 is an equidigital number, since it uses as much as digits as its factorization.

11000077776781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806736, while the sum is 52.

It can be divided in two parts, 1100007 and 7776781, that added together give a palindrome (8876788).

The spelling of 11000077776781 in words is "eleven trillion, seventy-seven million, seven hundred seventy-six thousand, seven hundred eighty-one".