19790450791 has 2 divisors, whose sum is σ = 19790450792. Its totient is φ = 19790450790.

The previous prime is 19790450741. The next prime is 19790450803. The reversal of 19790450791 is 19705409791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19790450791 - 2⁷ = 19790450663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19790450741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9895225395 + 9895225396.

It is an arithmetic number, because the mean of its divisors is an integer number (9895225396).

Almost surely, 2^19790450791 is an apocalyptic number.

19790450791 is a deficient number, since it is larger than the sum of its proper divisors (1).

19790450791 is an equidigital number, since it uses as much as digits as its factorization.

19790450791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 52.

The spelling of 19790450791 in words is "nineteen billion, seven hundred ninety million, four hundred fifty thousand, seven hundred ninety-one".