2116623650551 has 8 divisors (see below), whose sum is σ = 2121718644864. Its totient is φ = 2111534656440.

The previous prime is 2116623650549. The next prime is 2116623650593. The reversal of 2116623650551 is 1550563266112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2116623650551 - 2¹ = 2116623650549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2116623650498 and 2116623650507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116623650951) 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, 793285 + ... + 2205118.

It is an arithmetic number, because the mean of its divisors is an integer number (265214830608).

Almost surely, 2^{2116623650551} is an apocalyptic number.

2116623650551 is a deficient number, since it is larger than the sum of its proper divisors (5094994313).

2116623650551 is an equidigital number, since it uses as much as digits as its factorization.

2116623650551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000101.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 2116623650551 in words is "two trillion, one hundred sixteen billion, six hundred twenty-three million, six hundred fifty thousand, five hundred fifty-one".