16391431747 has 2 divisors, whose sum is σ = 16391431748. Its totient is φ = 16391431746.

The previous prime is 16391431733. The next prime is 16391431783. The reversal of 16391431747 is 74713419361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16391431747 - 2⁷ = 16391431619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16391431697 and 16391431706.

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, 8195715873 + 8195715874.

It is an arithmetic number, because the mean of its divisors is an integer number (8195715874).

Almost surely, 2^16391431747 is an apocalyptic number.

16391431747 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391431747 is an equidigital number, since it uses as much as digits as its factorization.

16391431747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 46.

The spelling of 16391431747 in words is "sixteen billion, three hundred ninety-one million, four hundred thirty-one thousand, seven hundred forty-seven".