1189878495787 has 2 divisors, whose sum is σ = 1189878495788. Its totient is φ = 1189878495786.

The previous prime is 1189878495779. The next prime is 1189878495853. The reversal of 1189878495787 is 7875948789811.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1189878495787 - 2³ = 1189878495779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1189878495787.

It is not a weakly prime, because it can be changed into another prime (1189878495887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594939247893 + 594939247894.

It is an arithmetic number, because the mean of its divisors is an integer number (594939247894).

Almost surely, 2^{1189878495787} is an apocalyptic number.

1189878495787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189878495787 is an equidigital number, since it uses as much as digits as its factorization.

1189878495787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2275983360, while the sum is 82.

The spelling of 1189878495787 in words is "one trillion, one hundred eighty-nine billion, eight hundred seventy-eight million, four hundred ninety-five thousand, seven hundred eighty-seven".