2116645315646 has 64 divisors (see below), whose sum is σ = 3499088785920. Its totient is φ = 955813478400.

The previous prime is 2116645315639. The next prime is 2116645315717. The reversal of 2116645315646 is 6465135466112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2116645315594 and 2116645315603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612276350 + ... + 612279806.

It is an arithmetic number, because the mean of its divisors is an integer number (54673262280).

Almost surely, 2^{2116645315646} is an apocalyptic number.

2116645315646 is a deficient number, since it is larger than the sum of its proper divisors (1382443470274).

2116645315646 is a wasteful number, since it uses less digits than its factorization.

2116645315646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649.

The product of its digits is 3110400, while the sum is 50.

The spelling of 2116645315646 in words is "two trillion, one hundred sixteen billion, six hundred forty-five million, three hundred fifteen thousand, six hundred forty-six".