13155215463665 has 16 divisors (see below), whose sum is σ = 18234394911360. Its totient is φ = 9004639461120.

The previous prime is 13155215463661. The next prime is 13155215463727. The reversal of 13155215463665 is 56636451255131.

It is not a de Polignac number, because 13155215463665 - 2² = 13155215463661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13155215463661) 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, 7034873645 + ... + 7034875514.

It is an arithmetic number, because the mean of its divisors is an integer number (1139649681960).

Almost surely, 2^{13155215463665} is an apocalyptic number.

It is an amenable number.

13155215463665 is a deficient number, since it is larger than the sum of its proper divisors (5079179447695).

13155215463665 is a wasteful number, since it uses less digits than its factorization.

13155215463665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14069749192.

The product of its digits is 9720000, while the sum is 53.

The spelling of 13155215463665 in words is "thirteen trillion, one hundred fifty-five billion, two hundred fifteen million, four hundred sixty-three thousand, six hundred sixty-five".