1189278328427 has 16 divisors (see below), whose sum is σ = 1514870231040. Its totient is φ = 908922135168.

The previous prime is 1189278328409. The next prime is 1189278328487. The reversal of 1189278328427 is 7248238729811.

It is a cyclic number.

It is not a de Polignac number, because 1189278328427 - 2¹² = 1189278324331 is a prime.

It is a super-2 number, since 2×1189278328427² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1189278328427.

It is not an unprimeable number, because it can be changed into a prime (1189278328487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262996043 + ... + 263000564.

It is an arithmetic number, because the mean of its divisors is an integer number (94679389440).

Almost surely, 2^{1189278328427} is an apocalyptic number.

1189278328427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1189278328427 is a deficient number, since it is larger than the sum of its proper divisors (325591902613).

1189278328427 is a wasteful number, since it uses less digits than its factorization.

1189278328427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525996650.

The product of its digits is 21676032, while the sum is 62.

The spelling of 1189278328427 in words is "one trillion, one hundred eighty-nine billion, two hundred seventy-eight million, three hundred twenty-eight thousand, four hundred twenty-seven".