11426979381 has 4 divisors (see below), whose sum is σ = 15235972512. Its totient is φ = 7617986252.

The previous prime is 11426979379. The next prime is 11426979461. The reversal of 11426979381 is 18397962411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11426979381 - 2¹ = 11426979379 is a prime.

It is a super-2 number, since 2×11426979381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11426979281) 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, 1904496561 + ... + 1904496566.

It is an arithmetic number, because the mean of its divisors is an integer number (3808993128).

Almost surely, 2^11426979381 is an apocalyptic number.

It is an amenable number.

11426979381 is a deficient number, since it is larger than the sum of its proper divisors (3808993131).

11426979381 is an equidigital number, since it uses as much as digits as its factorization.

11426979381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808993130.

The product of its digits is 653184, while the sum is 51.

The spelling of 11426979381 in words is "eleven billion, four hundred twenty-six million, nine hundred seventy-nine thousand, three hundred eighty-one".