53625621905 has 4 divisors (see below), whose sum is σ = 64350746292. Its totient is φ = 42900497520.

The previous prime is 53625621887. The next prime is 53625621949. The reversal of 53625621905 is 50912652635.

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 30415708801 + 23209913104 = 174401^2 + 152348^2 .

It is not a de Polignac number, because 53625621905 - 2²⁴ = 53608844689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5362562186 + ... + 5362562195.

It is an arithmetic number, because the mean of its divisors is an integer number (16087686573).

Almost surely, 2^53625621905 is an apocalyptic number.

It is an amenable number.

53625621905 is a deficient number, since it is larger than the sum of its proper divisors (10725124387).

53625621905 is a wasteful number, since it uses less digits than its factorization.

53625621905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10725124386.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 53625621905 in words is "fifty-three billion, six hundred twenty-five million, six hundred twenty-one thousand, nine hundred five".