54215725805 has 16 divisors (see below), whose sum is σ = 65191366704. Its totient is φ = 43284326400.

The previous prime is 54215725801. The next prime is 54215725841. The reversal of 54215725805 is 50852751245.

It can be written as a sum of positive squares in 8 ways, for example, as 992313001 + 53223412804 = 31501^2 + 230702^2 .

It is not a de Polignac number, because 54215725805 - 2² = 54215725801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54215725801) 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 15 ways as a sum of consecutive naturals, for example, 8601155 + ... + 8607455.

It is an arithmetic number, because the mean of its divisors is an integer number (4074460419).

Almost surely, 2^54215725805 is an apocalyptic number.

It is an amenable number.

54215725805 is a deficient number, since it is larger than the sum of its proper divisors (10975640899).

54215725805 is a wasteful number, since it uses less digits than its factorization.

54215725805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 560000, while the sum is 44.

The spelling of 54215725805 in words is "fifty-four billion, two hundred fifteen million, seven hundred twenty-five thousand, eight hundred five".