16391431783 has 2 divisors, whose sum is σ = 16391431784. Its totient is φ = 16391431782.

The previous prime is 16391431747. The next prime is 16391431787. The reversal of 16391431783 is 38713419361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16391431783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16391431787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195715891 + 8195715892.

It is an arithmetic number, because the mean of its divisors is an integer number (8195715892).

Almost surely, 2^16391431783 is an apocalyptic number.

16391431783 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391431783 is an equidigital number, since it uses as much as digits as its factorization.

16391431783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The spelling of 16391431783 in words is "sixteen billion, three hundred ninety-one million, four hundred thirty-one thousand, seven hundred eighty-three".