55861191049 has 4 divisors (see below), whose sum is σ = 55861940736. Its totient is φ = 55860441364.

The previous prime is 55861191041. The next prime is 55861191121. The reversal of 55861191049 is 94019116855.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94019116855 = 5 ⋅18803823371.

It is a cyclic number.

It is not a de Polignac number, because 55861191049 - 2³ = 55861191041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55861190993 and 55861191011.

It is not an unprimeable number, because it can be changed into a prime (55861191041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248989 + ... + 416794.

It is an arithmetic number, because the mean of its divisors is an integer number (13965485184).

Almost surely, 2^55861191049 is an apocalyptic number.

It is an amenable number.

55861191049 is a deficient number, since it is larger than the sum of its proper divisors (749687).

55861191049 is an equidigital number, since it uses as much as digits as its factorization.

55861191049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749686.

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 55861191049 in words is "fifty-five billion, eight hundred sixty-one million, one hundred ninety-one thousand, forty-nine".