55447218765 has 64 divisors (see below), whose sum is σ = 100462464000. Its totient is φ = 29372518080.

The previous prime is 55447218737. The next prime is 55447218779. The reversal of 55447218765 is 56781274455.

It is a happy number.

55447218765 is a `hidden beast` number, since 5 + 544 + 7 + 21 + 8 + 76 + 5 = 666.

It is not a de Polignac number, because 55447218765 - 2⁷ = 55447218637 is a prime.

It is a congruent number.

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 in 63 ways as a sum of consecutive naturals, for example, 1612300 + ... + 1646330.

It is an arithmetic number, because the mean of its divisors is an integer number (1569726000).

Almost surely, 2^55447218765 is an apocalyptic number.

It is an amenable number.

55447218765 is a deficient number, since it is larger than the sum of its proper divisors (45015245235).

55447218765 is an equidigital number, since it uses as much as digits as its factorization.

55447218765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34206 (or 34188 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 54.

The spelling of 55447218765 in words is "fifty-five billion, four hundred forty-seven million, two hundred eighteen thousand, seven hundred sixty-five".