1189728617377 has 2 divisors, whose sum is σ = 1189728617378. Its totient is φ = 1189728617376.

The previous prime is 1189728617351. The next prime is 1189728617417. The reversal of 1189728617377 is 7737168279811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873011791201 + 316716826176 = 934351^2 + 562776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189728617377 - 2⁷ = 1189728617249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1189728617327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594864308688 + 594864308689.

It is an arithmetic number, because the mean of its divisors is an integer number (594864308689).

Almost surely, 2^{1189728617377} is an apocalyptic number.

It is an amenable number.

1189728617377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189728617377 is an equidigital number, since it uses as much as digits as its factorization.

1189728617377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49787136, while the sum is 67.

The spelling of 1189728617377 in words is "one trillion, one hundred eighty-nine billion, seven hundred twenty-eight million, six hundred seventeen thousand, three hundred seventy-seven".