55505004997 has 4 divisors (see below), whose sum is σ = 59774620780. Its totient is φ = 51235389216.

The previous prime is 55505004979. The next prime is 55505005009. The reversal of 55505004997 is 79940050555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22030277476 + 33474727521 = 148426^2 + 182961^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505004997 - 2²³ = 55496616389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55505004997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505004697) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2134807872 + ... + 2134807897.

It is an arithmetic number, because the mean of its divisors is an integer number (14943655195).

Almost surely, 2^55505004997 is an apocalyptic number.

It is an amenable number.

55505004997 is a deficient number, since it is larger than the sum of its proper divisors (4269615783).

55505004997 is a wasteful number, since it uses less digits than its factorization.

55505004997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269615782.

The product of its (nonzero) digits is 1417500, while the sum is 49.

The spelling of 55505004997 in words is "fifty-five billion, five hundred five million, four thousand, nine hundred ninety-seven".