11576867381 has 4 divisors (see below), whose sum is σ = 11602651500. Its totient is φ = 11551083264.

The previous prime is 11576867347. The next prime is 11576867443. The reversal of 11576867381 is 18376867511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18376867511 = 11831 ⋅1553281.

It can be written as a sum of positive squares in 2 ways, for example, as 6271056100 + 5305811281 = 79190^2 + 72841^2 .

It is a cyclic number.

It is not a de Polignac number, because 11576867381 - 2¹⁴ = 11576850997 is a prime.

It is a super-2 number, since 2×11576867381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11576867681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12891386 + ... + 12892283.

It is an arithmetic number, because the mean of its divisors is an integer number (2900662875).

Almost surely, 2^11576867381 is an apocalyptic number.

It is an amenable number.

11576867381 is a deficient number, since it is larger than the sum of its proper divisors (25784119).

11576867381 is an equidigital number, since it uses as much as digits as its factorization.

11576867381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25784118.

The product of its digits is 1693440, while the sum is 53.

The spelling of 11576867381 in words is "eleven billion, five hundred seventy-six million, eight hundred sixty-seven thousand, three hundred eighty-one".