5405256064521 has 12 divisors (see below), whose sum is σ = 7808920217280. Its totient is φ = 3602891062680.

The previous prime is 5405256064499. The next prime is 5405256064583. The reversal of 5405256064521 is 1254606525045.

5405256064521 is a `hidden beast` number, since 5 + 4 + 0 + 5 + 2 + 5 + 60 + 64 + 521 = 666.

It is not a de Polignac number, because 5405256064521 - 2⁶ = 5405256064457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5405256063521) 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 11 ways as a sum of consecutive naturals, for example, 51025845 + ... + 51131666.

It is an arithmetic number, because the mean of its divisors is an integer number (650743351440).

Almost surely, 2^{5405256064521} is an apocalyptic number.

It is an amenable number.

5405256064521 is a deficient number, since it is larger than the sum of its proper divisors (2403664152759).

5405256064521 is a wasteful number, since it uses less digits than its factorization.

5405256064521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102163396 (or 102163393 counting only the distinct ones).

The product of its (nonzero) digits is 1440000, while the sum is 45.

The spelling of 5405256064521 in words is "five trillion, four hundred five billion, two hundred fifty-six million, sixty-four thousand, five hundred twenty-one".