16327985431 has 2 divisors, whose sum is σ = 16327985432. Its totient is φ = 16327985430.

The previous prime is 16327985383. The next prime is 16327985437. The reversal of 16327985431 is 13458972361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16327985431 - 2²¹ = 16325888279 is a prime.

It is a super-2 number, since 2×16327985431² (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 (16327985437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8163992715 + 8163992716.

It is an arithmetic number, because the mean of its divisors is an integer number (8163992716).

Almost surely, 2^16327985431 is an apocalyptic number.

16327985431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16327985431 is an equidigital number, since it uses as much as digits as its factorization.

16327985431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The spelling of 16327985431 in words is "sixteen billion, three hundred twenty-seven million, nine hundred eighty-five thousand, four hundred thirty-one".