16181272631 has 2 divisors, whose sum is σ = 16181272632. Its totient is φ = 16181272630.

The previous prime is 16181272621. The next prime is 16181272669. The reversal of 16181272631 is 13627218161.

16181272631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (16181272669) can be obtained adding 16181272631 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16181272631 - 2²² = 16177078327 is a prime.

It is a super-2 number, since 2×16181272631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16181272621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8090636315 + 8090636316.

It is an arithmetic number, because the mean of its divisors is an integer number (8090636316).

Almost surely, 2^16181272631 is an apocalyptic number.

16181272631 is a deficient number, since it is larger than the sum of its proper divisors (1).

16181272631 is an equidigital number, since it uses as much as digits as its factorization.

16181272631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The spelling of 16181272631 in words is "sixteen billion, one hundred eighty-one million, two hundred seventy-two thousand, six hundred thirty-one".