11378876281081 has 9 divisors (see below), whose sum is σ = 12087656136399. Its totient is φ = 10709476645344.

The previous prime is 11378876281043. The next prime is 11378876281127. The reversal of 11378876281081 is 18018267887311.

The square root of 11378876281081 is 3373259.

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

It can be written as a sum of positive squares in only one way, i.e., 8858986724025 + 2519889557056 = 2976405^2 + 1587416^2 .

It is not a de Polignac number, because 11378876281081 - 2²³ = 11378867892473 is a prime.

It is a super-2 number, since 2×11378876281081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11378876284081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 57246190 + ... + 57444616.

Almost surely, 2^{11378876281081} is an apocalyptic number.

11378876281081 is the 3373259-th square number.

11378876281081 is the 1686630-th centered octagonal number.

It is an amenable number.

11378876281081 is a deficient number, since it is larger than the sum of its proper divisors (708779855318).

11378876281081 is an frugal number, since it uses more digits than its factorization.

11378876281081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396888 (or 198444 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 61.

The spelling of 11378876281081 in words is "eleven trillion, three hundred seventy-eight billion, eight hundred seventy-six million, two hundred eighty-one thousand, eighty-one".