13286728623 has 24 divisors (see below), whose sum is σ = 20613201840. Its totient is φ = 7590495360.

The previous prime is 13286728571. The next prime is 13286728643. The reversal of 13286728623 is 32682768231.

It is a happy number.

It is not a de Polignac number, because 13286728623 - 2²¹ = 13284631471 is a prime.

It is a super-2 number, since 2×13286728623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13286728643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 738013 + ... + 755801.

It is an arithmetic number, because the mean of its divisors is an integer number (858883410).

Almost surely, 2^13286728623 is an apocalyptic number.

13286728623 is a deficient number, since it is larger than the sum of its proper divisors (7326473217).

13286728623 is a wasteful number, since it uses less digits than its factorization.

13286728623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22887 (or 22880 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The spelling of 13286728623 in words is "thirteen billion, two hundred eighty-six million, seven hundred twenty-eight thousand, six hundred twenty-three".