16715635121971 has 2 divisors, whose sum is σ = 16715635121972. Its totient is φ = 16715635121970.

The previous prime is 16715635121947. The next prime is 16715635122031. The reversal of 16715635121971 is 17912153651761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16715635121971 - 2¹¹ = 16715635119923 is a prime.

It is not a weakly prime, because it can be changed into another prime (16715635721971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8357817560985 + 8357817560986.

It is an arithmetic number, because the mean of its divisors is an integer number (8357817560986).

Almost surely, 2^{16715635121971} is an apocalyptic number.

16715635121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

16715635121971 is an equidigital number, since it uses as much as digits as its factorization.

16715635121971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 55.

The spelling of 16715635121971 in words is "sixteen trillion, seven hundred fifteen billion, six hundred thirty-five million, one hundred twenty-one thousand, nine hundred seventy-one".