6615111101616 has 120 divisors (see below), whose sum is σ = 19878217560864. Its totient is φ = 2046098933760.

The previous prime is 6615111101593. The next prime is 6615111101659. The reversal of 6615111101616 is 6161011115166.

It is a happy number.

6615111101616 is a `hidden beast` number, since 6 + 6 + 1 + 511 + 110 + 16 + 16 = 666.

It is a super-2 number, since 2×6615111101616² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18856131 + ... + 19203746.

Almost surely, 2^{6615111101616} is an apocalyptic number.

It is an amenable number.

6615111101616 is an abundant number, since it is smaller than the sum of its proper divisors (13263106459248).

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

6615111101616 is a wasteful number, since it uses less digits than its factorization.

6615111101616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38059979 (or 38059970 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 6615111101616 in words is "six trillion, six hundred fifteen billion, one hundred eleven million, one hundred one thousand, six hundred sixteen".