54993982369 has 4 divisors (see below), whose sum is σ = 55814788144. Its totient is φ = 54173176596.

The previous prime is 54993982349. The next prime is 54993982391. The reversal of 54993982369 is 96328939945.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 54993982369 - 2³¹ = 52846498721 is a prime.

It is a super-2 number, since 2×54993982369² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67), and also a Moran number because the ratio is a prime number: 820805707 = 54993982369 / (5 + 4 + 9 + 9 + 3 + 9 + 8 + 2 + 3 + 6 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54993982349) 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, 410402787 + ... + 410402920.

It is an arithmetic number, because the mean of its divisors is an integer number (13953697036).

Almost surely, 2^54993982369 is an apocalyptic number.

It is an amenable number.

54993982369 is a deficient number, since it is larger than the sum of its proper divisors (820805775).

54993982369 is an equidigital number, since it uses as much as digits as its factorization.

54993982369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820805774.

The product of its digits is 113374080, while the sum is 67.

The spelling of 54993982369 in words is "fifty-four billion, nine hundred ninety-three million, nine hundred eighty-two thousand, three hundred sixty-nine".