1189215728497 has 2 divisors, whose sum is σ = 1189215728498. Its totient is φ = 1189215728496.

The previous prime is 1189215728473. The next prime is 1189215728521. The reversal of 1189215728497 is 7948275129811.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1189215728473) and next prime (1189215728521).

It can be written as a sum of positive squares in only one way, i.e., 1087882376256 + 101333352241 = 1043016^2 + 318329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189215728497 - 2²³ = 1189207339889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1189215723497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594607864248 + 594607864249.

It is an arithmetic number, because the mean of its divisors is an integer number (594607864249).

Almost surely, 2^{1189215728497} is an apocalyptic number.

It is an amenable number.

1189215728497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189215728497 is an equidigital number, since it uses as much as digits as its factorization.

1189215728497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 64.

The spelling of 1189215728497 in words is "one trillion, one hundred eighty-nine billion, two hundred fifteen million, seven hundred twenty-eight thousand, four hundred ninety-seven".