1189278714642 has 32 divisors (see below), whose sum is σ = 2384350981632. Its totient is φ = 395461676544.

The previous prime is 1189278714581. The next prime is 1189278714649. The reversal of 1189278714642 is 2464178729811.

It is a happy number.

It is a super-2 number, since 2×1189278714642² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1189278714649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4522978 + ... + 4778690.

It is an arithmetic number, because the mean of its divisors is an integer number (74510968176).

Almost surely, 2^{1189278714642} is an apocalyptic number.

1189278714642 is an abundant number, since it is smaller than the sum of its proper divisors (1195072266990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1189278714642 is a wasteful number, since it uses less digits than its factorization.

1189278714642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257602.

The product of its digits is 10838016, while the sum is 60.

The spelling of 1189278714642 in words is "one trillion, one hundred eighty-nine billion, two hundred seventy-eight million, seven hundred fourteen thousand, six hundred forty-two".