13089749856 has 48 divisors (see below), whose sum is σ = 34491308544. Its totient is φ = 4346651264.

The previous prime is 13089749837. The next prime is 13089749891. The reversal of 13089749856 is 65894798031.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 13089749856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233976 + ... + 284471.

It is an arithmetic number, because the mean of its divisors is an integer number (718568928).

Almost surely, 2^13089749856 is an apocalyptic number.

13089749856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13089749856 is an abundant number, since it is smaller than the sum of its proper divisors (21401558688).

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

13089749856 is a wasteful number, since it uses less digits than its factorization.

13089749856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518723 (or 518715 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 13089749856 in words is "thirteen billion, eighty-nine million, seven hundred forty-nine thousand, eight hundred fifty-six".