11442155511 has 4 divisors (see below), whose sum is σ = 15256207352. Its totient is φ = 7628103672.

The previous prime is 11442155497. The next prime is 11442155573. The reversal of 11442155511 is 11555124411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11442155511 - 2⁵ = 11442155479 is a prime.

It is a super-2 number, since 2×11442155511² (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 (11442153511) 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 3 ways as a sum of consecutive naturals, for example, 1907025916 + ... + 1907025921.

It is an arithmetic number, because the mean of its divisors is an integer number (3814051838).

Almost surely, 2^11442155511 is an apocalyptic number.

11442155511 is a deficient number, since it is larger than the sum of its proper divisors (3814051841).

11442155511 is an equidigital number, since it uses as much as digits as its factorization.

11442155511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814051840.

The product of its digits is 4000, while the sum is 30.

Adding to 11442155511 its reverse (11555124411), we get a palindrome (22997279922).

The spelling of 11442155511 in words is "eleven billion, four hundred forty-two million, one hundred fifty-five thousand, five hundred eleven".