2116611656612 has 24 divisors (see below), whose sum is σ = 3925843994520. Its totient is φ = 995065344000.

The previous prime is 2116611656611. The next prime is 2116611656617. The reversal of 2116611656612 is 2166561166112.

It can be written as a sum of positive squares in 4 ways, for example, as 1069706158756 + 1046905497856 = 1034266^2 + 1023184^2 .

It is not an unprimeable number, because it can be changed into a prime (2116611656611) 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, 15355889 + ... + 15493112.

It is an arithmetic number, because the mean of its divisors is an integer number (163576833105).

Almost surely, 2^{2116611656612} is an apocalyptic number.

It is an amenable number.

2116611656612 is a deficient number, since it is larger than the sum of its proper divisors (1809232337908).

2116611656612 is a wasteful number, since it uses less digits than its factorization.

2116611656612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30850031 (or 30850029 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The spelling of 2116611656612 in words is "two trillion, one hundred sixteen billion, six hundred eleven million, six hundred fifty-six thousand, six hundred twelve".