11581402379 has 4 divisors (see below), whose sum is σ = 11658100560. Its totient is φ = 11504704200.

The previous prime is 11581402351. The next prime is 11581402411. The reversal of 11581402379 is 97320418511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97320418511 = 70201 ⋅1386311.

It is a cyclic number.

It is not a de Polignac number, because 11581402379 - 2⁸ = 11581402123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11581402319) 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, 38348864 + ... + 38349165.

It is an arithmetic number, because the mean of its divisors is an integer number (2914525140).

Almost surely, 2^11581402379 is an apocalyptic number.

11581402379 is a deficient number, since it is larger than the sum of its proper divisors (76698181).

11581402379 is an equidigital number, since it uses as much as digits as its factorization.

11581402379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76698180.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 11581402379 in words is "eleven billion, five hundred eighty-one million, four hundred two thousand, three hundred seventy-nine".