13621012511255 has 32 divisors (see below), whose sum is σ = 16925414400000. Its totient is φ = 10510751268864.

The previous prime is 13621012511243. The next prime is 13621012511317. The reversal of 13621012511255 is 55211521012631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13621012511255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1064218346 + ... + 1064231144.

It is an arithmetic number, because the mean of its divisors is an integer number (528919200000).

Almost surely, 2^{13621012511255} is an apocalyptic number.

13621012511255 is a deficient number, since it is larger than the sum of its proper divisors (3304401888745).

13621012511255 is a wasteful number, since it uses less digits than its factorization.

13621012511255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19451.

The product of its (nonzero) digits is 18000, while the sum is 35.

Adding to 13621012511255 its reverse (55211521012631), we get a palindrome (68832533523886).

The spelling of 13621012511255 in words is "thirteen trillion, six hundred twenty-one billion, twelve million, five hundred eleven thousand, two hundred fifty-five".