19077396517 has 2 divisors, whose sum is σ = 19077396518. Its totient is φ = 19077396516.

The previous prime is 19077396431. The next prime is 19077396563. The reversal of 19077396517 is 71569377091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18924404356 + 152992161 = 137566^2 + 12369^2 .

It is an emirp because it is prime and its reverse (71569377091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19077396517 - 2⁷ = 19077396389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19077390517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9538698258 + 9538698259.

It is an arithmetic number, because the mean of its divisors is an integer number (9538698259).

Almost surely, 2^19077396517 is an apocalyptic number.

It is an amenable number.

19077396517 is a deficient number, since it is larger than the sum of its proper divisors (1).

19077396517 is an equidigital number, since it uses as much as digits as its factorization.

19077396517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The spelling of 19077396517 in words is "nineteen billion, seventy-seven million, three hundred ninety-six thousand, five hundred seventeen".