11438147779 has 24 divisors (see below), whose sum is σ = 12391400736. Its totient is φ = 10537718400.

The previous prime is 11438147767. The next prime is 11438147789. The reversal of 11438147779 is 97774183411.

It is not a de Polignac number, because 11438147779 - 2⁹ = 11438147267 is a prime.

It is a super-2 number, since 2×11438147779² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11438147729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5148889 + ... + 5151109.

It is an arithmetic number, because the mean of its divisors is an integer number (516308364).

Almost surely, 2^11438147779 is an apocalyptic number.

11438147779 is a deficient number, since it is larger than the sum of its proper divisors (953252957).

11438147779 is a wasteful number, since it uses less digits than its factorization.

11438147779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539 (or 2508 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 52.

The spelling of 11438147779 in words is "eleven billion, four hundred thirty-eight million, one hundred forty-seven thousand, seven hundred seventy-nine".