11934198977281 has 27 divisors (see below), whose sum is σ = 14062844803329. Its totient is φ = 10098211680648.

The previous prime is 11934198977243. The next prime is 11934198977339. The reversal of 11934198977281 is 18277989143911.

The square root of 11934198977281 is 3454591.

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

It is not a de Polignac number, because 11934198977281 - 2⁹ = 11934198976769 is a prime.

It is a super-2 number, since 2×11934198977281² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11934198977281.

It is not an unprimeable number, because it can be changed into a prime (11934198977681) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1910385700 + ... + 1910391946.

It is an arithmetic number, because the mean of its divisors is an integer number (520846103827).

Almost surely, 2^{11934198977281} is an apocalyptic number.

11934198977281 is the 3454591-st square number.

11934198977281 is the 1727296-th centered octagonal number.

It is an amenable number.

11934198977281 is a deficient number, since it is larger than the sum of its proper divisors (2128645826048).

11934198977281 is an frugal number, since it uses more digits than its factorization.

11934198977281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12666 (or 6333 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 70.

The spelling of 11934198977281 in words is "eleven trillion, nine hundred thirty-four billion, one hundred ninety-eight million, nine hundred seventy-seven thousand, two hundred eighty-one".