55187982365 has 4 divisors (see below), whose sum is σ = 66225578844. Its totient is φ = 44150385888.

The previous prime is 55187982337. The next prime is 55187982371. The reversal of 55187982365 is 56328978155.

It is a happy number.

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 9700477081 + 45487505284 = 98491^2 + 213278^2 .

It is a cyclic number.

It is not a de Polignac number, because 55187982365 - 2¹⁰ = 55187981341 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 5518798232 + ... + 5518798241.

It is an arithmetic number, because the mean of its divisors is an integer number (16556394711).

Almost surely, 2^55187982365 is an apocalyptic number.

It is an amenable number.

55187982365 is a deficient number, since it is larger than the sum of its proper divisors (11037596479).

55187982365 is a wasteful number, since it uses less digits than its factorization.

55187982365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11037596478.

The product of its digits is 18144000, while the sum is 59.

The spelling of 55187982365 in words is "fifty-five billion, one hundred eighty-seven million, nine hundred eighty-two thousand, three hundred sixty-five".