11880420565381 has 8 divisors (see below), whose sum is σ = 12368657029784. Its totient is φ = 11400981154560.

The previous prime is 11880420565339. The next prime is 11880420565393. The reversal of 11880420565381 is 18356502408811.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8367082693281 + 3513337872100 = 2892591^2 + 1874390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11880420565381 - 2¹³ = 11880420557189 is a prime.

It is a super-2 number, since 2×11880420565381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11880420563381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2199260640 + ... + 2199266041.

It is an arithmetic number, because the mean of its divisors is an integer number (1546082128723).

Almost surely, 2^{11880420565381} is an apocalyptic number.

It is an amenable number.

11880420565381 is a deficient number, since it is larger than the sum of its proper divisors (488236464403).

11880420565381 is an equidigital number, since it uses as much as digits as its factorization.

11880420565381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398526791.

The product of its (nonzero) digits is 1843200, while the sum is 52.

The spelling of 11880420565381 in words is "eleven trillion, eight hundred eighty billion, four hundred twenty million, five hundred sixty-five thousand, three hundred eighty-one".