13155885681 has 8 divisors (see below), whose sum is σ = 17542591584. Its totient is φ = 8769885120.

The previous prime is 13155885653. The next prime is 13155885709. The reversal of 13155885681 is 18658855131.

It is an interprime number because it is at equal distance from previous prime (13155885653) and next prime (13155885709).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13155885681 is a prime.

It is a super-2 number, since 2×13155885681² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13155885181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131160 + ... + 208601.

It is an arithmetic number, because the mean of its divisors is an integer number (2192823948).

Almost surely, 2^13155885681 is an apocalyptic number.

It is an amenable number.

13155885681 is a deficient number, since it is larger than the sum of its proper divisors (4386705903).

13155885681 is a wasteful number, since it uses less digits than its factorization.

13155885681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352671.

The product of its digits is 1152000, while the sum is 51.

The spelling of 13155885681 in words is "thirteen billion, one hundred fifty-five million, eight hundred eighty-five thousand, six hundred eighty-one".