1178258566438 has 16 divisors (see below), whose sum is σ = 1778313148416. Its totient is φ = 585493322760.

The previous prime is 1178258566423. The next prime is 1178258566439. The reversal of 1178258566438 is 8346658528711.

It is a self number, because there is not a number n which added to its sum of digits gives 1178258566438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178258566439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044756 + ... + 1856887.

It is an arithmetic number, because the mean of its divisors is an integer number (111144571776).

Almost surely, 2^{1178258566438} is an apocalyptic number.

1178258566438 is a deficient number, since it is larger than the sum of its proper divisors (600054581978).

1178258566438 is a wasteful number, since it uses less digits than its factorization.

1178258566438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902899.

The product of its digits is 77414400, while the sum is 64.

The spelling of 1178258566438 in words is "one trillion, one hundred seventy-eight billion, two hundred fifty-eight million, five hundred sixty-six thousand, four hundred thirty-eight".