1191486320639 has 2 divisors, whose sum is σ = 1191486320640. Its totient is φ = 1191486320638.

The previous prime is 1191486320621. The next prime is 1191486320653. The reversal of 1191486320639 is 9360236841911.

It is a strong prime.

It is an emirp because it is prime and its reverse (9360236841911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1191486320639 - 2³⁶ = 1122766843903 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191486325639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595743160319 + 595743160320.

It is an arithmetic number, because the mean of its divisors is an integer number (595743160320).

Almost surely, 2^{1191486320639} is an apocalyptic number.

1191486320639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191486320639 is an equidigital number, since it uses as much as digits as its factorization.

1191486320639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 1191486320639 in words is "one trillion, one hundred ninety-one billion, four hundred eighty-six million, three hundred twenty thousand, six hundred thirty-nine".