1611158808818 has 8 divisors (see below), whose sum is σ = 2602641152748. Its totient is φ = 743611757904.

The previous prime is 1611158808811. The next prime is 1611158808841. The reversal of 1611158808818 is 8188088511161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1296699180529 + 314459628289 = 1138727^2 + 560767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1611158808811) 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 3 ways as a sum of consecutive naturals, for example, 30983823221 + ... + 30983823272.

Almost surely, 2^{1611158808818} is an apocalyptic number.

1611158808818 is a deficient number, since it is larger than the sum of its proper divisors (991482343930).

1611158808818 is a wasteful number, since it uses less digits than its factorization.

1611158808818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61967646508.

The product of its (nonzero) digits is 983040, while the sum is 56.

The spelling of 1611158808818 in words is "one trillion, six hundred eleven billion, one hundred fifty-eight million, eight hundred eight thousand, eight hundred eighteen".