2116653345765 has 48 divisors (see below), whose sum is σ = 4193100912000. Its totient is φ = 967587244416.

The previous prime is 2116653345731. The next prime is 2116653345773. The reversal of 2116653345765 is 5675433566112.

2116653345765 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 6 + 533 + 45 + 7 + 65 = 666.

It is not a de Polignac number, because 2116653345765 - 2⁶ = 2116653345701 is a prime.

It is a super-2 number, since 2×2116653345765² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16915851 + ... + 17040519.

It is an arithmetic number, because the mean of its divisors is an integer number (87356269000).

Almost surely, 2^{2116653345765} is an apocalyptic number.

It is an amenable number.

2116653345765 is a deficient number, since it is larger than the sum of its proper divisors (2076447566235).

2116653345765 is a wasteful number, since it uses less digits than its factorization.

2116653345765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178586 (or 178583 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 54.

The spelling of 2116653345765 in words is "two trillion, one hundred sixteen billion, six hundred fifty-three million, three hundred forty-five thousand, seven hundred sixty-five".