2116601655651 has 32 divisors (see below), whose sum is σ = 3602426880000. Its totient is φ = 1203154248960.

The previous prime is 2116601655607. The next prime is 2116601655691. The reversal of 2116601655651 is 1565561066112.

2116601655651 is a `hidden beast` number, since 2 + 1 + 16 + 60 + 16 + 5 + 565 + 1 = 666.

It is not a de Polignac number, because 2116601655651 - 2⁷ = 2116601655523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2116601655597 and 2116601655606.

It is not an unprimeable number, because it can be changed into a prime (2116601655601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29280526 + ... + 29352723.

It is an arithmetic number, because the mean of its divisors is an integer number (112575840000).

Almost surely, 2^{2116601655651} is an apocalyptic number.

2116601655651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2116601655651 is a deficient number, since it is larger than the sum of its proper divisors (1485825224349).

2116601655651 is a wasteful number, since it uses less digits than its factorization.

2116601655651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58633456 (or 58633450 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 2116601655651 in words is "two trillion, one hundred sixteen billion, six hundred one million, six hundred fifty-five thousand, six hundred fifty-one".