16138807331 has 2 divisors, whose sum is σ = 16138807332. Its totient is φ = 16138807330.

The previous prime is 16138807231. The next prime is 16138807337. The reversal of 16138807331 is 13370883161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16138807331 is a prime.

It is a super-3 number, since 3×16138807331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (16138807337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069403665 + 8069403666.

It is an arithmetic number, because the mean of its divisors is an integer number (8069403666).

Almost surely, 2^16138807331 is an apocalyptic number.

16138807331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16138807331 is an equidigital number, since it uses as much as digits as its factorization.

16138807331 is an evil number, because the sum of its binary digits is even.

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

The spelling of 16138807331 in words is "sixteen billion, one hundred thirty-eight million, eight hundred seven thousand, three hundred thirty-one".