13650721255 has 4 divisors (see below), whose sum is σ = 16380865512. Its totient is φ = 10920577000.

The previous prime is 13650721223. The next prime is 13650721291. The reversal of 13650721255 is 55212705631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55212705631 = 89 ⋅620367479.

It is not a de Polignac number, because 13650721255 - 2⁵ = 13650721223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365072121 + ... + 1365072130.

It is an arithmetic number, because the mean of its divisors is an integer number (4095216378).

Almost surely, 2^13650721255 is an apocalyptic number.

13650721255 is a deficient number, since it is larger than the sum of its proper divisors (2730144257).

13650721255 is an equidigital number, since it uses as much as digits as its factorization.

13650721255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730144256.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 13650721255 in words is "thirteen billion, six hundred fifty million, seven hundred twenty-one thousand, two hundred fifty-five".