11297776681 has 3 divisors (see below), whose sum is σ = 11297882973. Its totient is φ = 11297670390.

The previous prime is 11297776667. The next prime is 11297776733. The reversal of 11297776681 is 18667779211.

The square root of 11297776681 is 106291.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11297776681 - 2¹⁵ = 11297743913 is a prime.

It is a super-2 number, since 2×11297776681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11297776661) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53146 + ... + 159436.

It is an arithmetic number, because the mean of its divisors is an integer number (3765960991).

Almost surely, 2^11297776681 is an apocalyptic number.

11297776681 is the 106291-st square number.

11297776681 is the 53146-th centered octagonal number.

It is an amenable number.

11297776681 is a deficient number, since it is larger than the sum of its proper divisors (106292).

11297776681 is an frugal number, since it uses more digits than its factorization.

11297776681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212582 (or 106291 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 55.

The spelling of 11297776681 in words is "eleven billion, two hundred ninety-seven million, seven hundred seventy-six thousand, six hundred eighty-one".