11555871442 has 4 divisors (see below), whose sum is σ = 17333807166. Its totient is φ = 5777935720.

The previous prime is 11555871433. The next prime is 11555871479. The reversal of 11555871442 is 24417855511.

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

It can be written as a sum of positive squares in only one way, i.e., 7749104841 + 3806766601 = 88029^2 + 61699^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2888967859 + ... + 2888967862.

Almost surely, 2^11555871442 is an apocalyptic number.

11555871442 is a deficient number, since it is larger than the sum of its proper divisors (5777935724).

11555871442 is an equidigital number, since it uses as much as digits as its factorization.

11555871442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777935723.

The product of its digits is 224000, while the sum is 43.

The spelling of 11555871442 in words is "eleven billion, five hundred fifty-five million, eight hundred seventy-one thousand, four hundred forty-two".