55479720237842 has 4 divisors (see below), whose sum is σ = 83219580356766. Its totient is φ = 27739860118920.

The previous prime is 55479720237829. The next prime is 55479720237859. The reversal of 55479720237842 is 24873202797455.

It is a Cunningham number, because it is equal to 7448471²+1.

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., 55479720237841 + 1 = 7448471^2 + 1^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13869930059459 + ... + 13869930059462.

Almost surely, 2^{55479720237842} is an apocalyptic number.

55479720237842 is a deficient number, since it is larger than the sum of its proper divisors (27739860118924).

55479720237842 is a wasteful number, since it uses less digits than its factorization.

55479720237842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27739860118923.

The product of its (nonzero) digits is 237081600, while the sum is 65.

The spelling of 55479720237842 in words is "fifty-five trillion, four hundred seventy-nine billion, seven hundred twenty million, two hundred thirty-seven thousand, eight hundred forty-two".