55218395446 has 8 divisors (see below), whose sum is σ = 86428792944. Its totient is φ = 26408797800.

The previous prime is 55218395443. The next prime is 55218395447. The reversal of 55218395446 is 64459381255.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 55218395393 and 55218395402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55218395443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600199905 + ... + 600199996.

It is an arithmetic number, because the mean of its divisors is an integer number (10803599118).

Almost surely, 2^55218395446 is an apocalyptic number.

55218395446 is a deficient number, since it is larger than the sum of its proper divisors (31210397498).

55218395446 is a wasteful number, since it uses less digits than its factorization.

55218395446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200399926.

The product of its digits is 5184000, while the sum is 52.

The spelling of 55218395446 in words is "fifty-five billion, two hundred eighteen million, three hundred ninety-five thousand, four hundred forty-six".