19767560797 has 2 divisors, whose sum is σ = 19767560798. Its totient is φ = 19767560796.

The previous prime is 19767560773. The next prime is 19767560801. The reversal of 19767560797 is 79706576791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11374435801 + 8393124996 = 106651^2 + 91614^2 .

It is a cyclic number.

It is not a de Polignac number, because 19767560797 - 2⁷ = 19767560669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19767569797) 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, 9883780398 + 9883780399.

It is an arithmetic number, because the mean of its divisors is an integer number (9883780399).

Almost surely, 2^19767560797 is an apocalyptic number.

It is an amenable number.

19767560797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19767560797 is an equidigital number, since it uses as much as digits as its factorization.

19767560797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35006580, while the sum is 64.

The spelling of 19767560797 in words is "nineteen billion, seven hundred sixty-seven million, five hundred sixty thousand, seven hundred ninety-seven".