54405019979 has 4 divisors (see below), whose sum is σ = 54476889984. Its totient is φ = 54333149976.

The previous prime is 54405019969. The next prime is 54405019993. The reversal of 54405019979 is 97991050445.

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

It is a cyclic number.

It is not a de Polignac number, because 54405019979 - 2⁸ = 54405019723 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 54405019979.

It is not an unprimeable number, because it can be changed into a prime (54405019939) 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, 35933867 + ... + 35935380.

It is an arithmetic number, because the mean of its divisors is an integer number (13619222496).

Almost surely, 2^54405019979 is an apocalyptic number.

54405019979 is a deficient number, since it is larger than the sum of its proper divisors (71870005).

54405019979 is an equidigital number, since it uses as much as digits as its factorization.

54405019979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71870004.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 54405019979 in words is "fifty-four billion, four hundred five million, nineteen thousand, nine hundred seventy-nine".