21413577547255 has 64 divisors (see below), whose sum is σ = 27062823997440. Its totient is φ = 16250307416064.

The previous prime is 21413577547249. The next prime is 21413577547259. The reversal of 21413577547255 is 55274577531412.

It is a cyclic number.

It is not a de Polignac number, because 21413577547255 - 2¹⁹ = 21413577022967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21413577547255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21413577547259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 343669434 + ... + 343731736.

It is an arithmetic number, because the mean of its divisors is an integer number (422856624960).

Almost surely, 2^{21413577547255} is an apocalyptic number.

21413577547255 is a deficient number, since it is larger than the sum of its proper divisors (5649246450185).

21413577547255 is a wasteful number, since it uses less digits than its factorization.

21413577547255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62728.

The product of its digits is 41160000, while the sum is 58.

The spelling of 21413577547255 in words is "twenty-one trillion, four hundred thirteen billion, five hundred seventy-seven million, five hundred forty-seven thousand, two hundred fifty-five".