19048557797 has 2 divisors, whose sum is σ = 19048557798. Its totient is φ = 19048557796.

The previous prime is 19048557767. The next prime is 19048557823. The reversal of 19048557797 is 79775584091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18692631841 + 355925956 = 136721^2 + 18866^2 .

It is a cyclic number.

It is not a de Polignac number, because 19048557797 - 2¹⁰ = 19048556773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19048557727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9524278898 + 9524278899.

It is an arithmetic number, because the mean of its divisors is an integer number (9524278899).

Almost surely, 2^19048557797 is an apocalyptic number.

It is an amenable number.

19048557797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19048557797 is an equidigital number, since it uses as much as digits as its factorization.

19048557797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22226400, while the sum is 62.

The spelling of 19048557797 in words is "nineteen billion, forty-eight million, five hundred fifty-seven thousand, seven hundred ninety-seven".