16408401391 has 2 divisors, whose sum is σ = 16408401392. Its totient is φ = 16408401390.

The previous prime is 16408401353. The next prime is 16408401403. The reversal of 16408401391 is 19310480461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16408401391 - 2⁷ = 16408401263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16408401391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16408401491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8204200695 + 8204200696.

It is an arithmetic number, because the mean of its divisors is an integer number (8204200696).

Almost surely, 2^16408401391 is an apocalyptic number.

16408401391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16408401391 is an equidigital number, since it uses as much as digits as its factorization.

16408401391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 16408401391 in words is "sixteen billion, four hundred eight million, four hundred one thousand, three hundred ninety-one".