105156216691 has 2 divisors, whose sum is σ = 105156216692. Its totient is φ = 105156216690.

The previous prime is 105156216629. The next prime is 105156216721. The reversal of 105156216691 is 196612651501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105156216691 is a prime.

It is a super-2 number, since 2×105156216691² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105156219691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52578108345 + 52578108346.

It is an arithmetic number, because the mean of its divisors is an integer number (52578108346).

Almost surely, 2^105156216691 is an apocalyptic number.

105156216691 is a deficient number, since it is larger than the sum of its proper divisors (1).

105156216691 is an equidigital number, since it uses as much as digits as its factorization.

105156216691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The spelling of 105156216691 in words is "one hundred five billion, one hundred fifty-six million, two hundred sixteen thousand, six hundred ninety-one".