16000000091 has 2 divisors, whose sum is σ = 16000000092. Its totient is φ = 16000000090.

The previous prime is 16000000067. The next prime is 16000000097. The reversal of 16000000091 is 19000000061.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16000000091 is a prime.

16000000091 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (16000000097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000000045 + 8000000046.

It is an arithmetic number, because the mean of its divisors is an integer number (8000000046).

Almost surely, 2^16000000091 is an apocalyptic number.

16000000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16000000091 is an equidigital number, since it uses as much as digits as its factorization.

16000000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 16000000091 in words is "sixteen billion, ninety-one", and thus it is an aban number and an uban number.