13173735081 has 16 divisors (see below), whose sum is σ = 20028847104. Its totient is φ = 7630036224.

The previous prime is 13173735077. The next prime is 13173735097. The reversal of 13173735081 is 18053737131.

It is not a de Polignac number, because 13173735081 - 2² = 13173735077 is a prime.

It is a super-2 number, since 2×13173735081² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (13173735031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9934281 + ... + 9935606.

It is an arithmetic number, because the mean of its divisors is an integer number (1251802944).

Almost surely, 2^13173735081 is an apocalyptic number.

It is an amenable number.

13173735081 is a deficient number, since it is larger than the sum of its proper divisors (6855112023).

13173735081 is a wasteful number, since it uses less digits than its factorization.

13173735081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19869920.

The product of its (nonzero) digits is 52920, while the sum is 39.

The spelling of 13173735081 in words is "thirteen billion, one hundred seventy-three million, seven hundred thirty-five thousand, eighty-one".