13721781255 has 192 divisors, whose sum is σ = 29206044672. Its totient is φ = 5351132160.

The previous prime is 13721781253. The next prime is 13721781263. The reversal of 13721781255 is 55218712731.

It is not a de Polignac number, because 13721781255 - 2¹ = 13721781253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721781253) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 22384329 + ... + 22384941.

It is an arithmetic number, because the mean of its divisors is an integer number (152114816).

Almost surely, 2^13721781255 is an apocalyptic number.

13721781255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13721781255 is an abundant number, since it is smaller than the sum of its proper divisors (15484263417).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13721781255 is a wasteful number, since it uses less digits than its factorization.

13721781255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 695 counting only the distinct ones).

The product of its digits is 117600, while the sum is 42.

The spelling of 13721781255 in words is "thirteen billion, seven hundred twenty-one million, seven hundred eighty-one thousand, two hundred fifty-five".