16123426691 has 2 divisors, whose sum is σ = 16123426692. Its totient is φ = 16123426690.

The previous prime is 16123426687. The next prime is 16123426793. The reversal of 16123426691 is 19662432161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16123426691 - 2² = 16123426687 is a prime.

It is not a weakly prime, because it can be changed into another prime (16123426601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061713345 + 8061713346.

It is an arithmetic number, because the mean of its divisors is an integer number (8061713346).

Almost surely, 2^16123426691 is an apocalyptic number.

16123426691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16123426691 is an equidigital number, since it uses as much as digits as its factorization.

16123426691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The spelling of 16123426691 in words is "sixteen billion, one hundred twenty-three million, four hundred twenty-six thousand, six hundred ninety-one".