13504857081 has 24 divisors (see below), whose sum is σ = 18627949152. Its totient is φ = 8702568000.

The previous prime is 13504857061. The next prime is 13504857089. The reversal of 13504857081 is 18075840531.

It is not a de Polignac number, because 13504857081 - 2⁹ = 13504856569 is a prime.

It is a super-2 number, since 2×13504857081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13504857089) 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, 3027805 + ... + 3032261.

It is an arithmetic number, because the mean of its divisors is an integer number (776164548).

Almost surely, 2^13504857081 is an apocalyptic number.

It is an amenable number.

13504857081 is a deficient number, since it is larger than the sum of its proper divisors (5123092071).

13504857081 is a wasteful number, since it uses less digits than its factorization.

13504857081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573 (or 5542 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 13504857081 in words is "thirteen billion, five hundred four million, eight hundred fifty-seven thousand, eighty-one".