11438684779 has 8 divisors (see below), whose sum is σ = 12041743680. Its totient is φ = 10835728200.

The previous prime is 11438684771. The next prime is 11438684839. The reversal of 11438684779 is 97748683411.

It is a happy number.

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 11438684779 - 2³ = 11438684771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11438684771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332664 + ... + 365434.

It is an arithmetic number, because the mean of its divisors is an integer number (1505217960).

Almost surely, 2^11438684779 is an apocalyptic number.

11438684779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11438684779 is a deficient number, since it is larger than the sum of its proper divisors (603058901).

11438684779 is a wasteful number, since it uses less digits than its factorization.

11438684779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51161.

The product of its digits is 8128512, while the sum is 58.

The spelling of 11438684779 in words is "eleven billion, four hundred thirty-eight million, six hundred eighty-four thousand, seven hundred seventy-nine".