16400938271 has 2 divisors, whose sum is σ = 16400938272. Its totient is φ = 16400938270.

The previous prime is 16400938249. The next prime is 16400938277. The reversal of 16400938271 is 17283900461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16400938271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16400938277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8200469135 + 8200469136.

It is an arithmetic number, because the mean of its divisors is an integer number (8200469136).

Almost surely, 2^16400938271 is an apocalyptic number.

16400938271 is a deficient number, since it is larger than the sum of its proper divisors (1).

16400938271 is an equidigital number, since it uses as much as digits as its factorization.

16400938271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 16400938271 in words is "sixteen billion, four hundred million, nine hundred thirty-eight thousand, two hundred seventy-one".