1618742886171 has 32 divisors (see below), whose sum is σ = 2323588861440. Its totient is φ = 999259582464.

The previous prime is 1618742886139. The next prime is 1618742886181. The reversal of 1618742886171 is 1716882478161.

It is a happy number.

It is not a de Polignac number, because 1618742886171 - 2⁵ = 1618742886139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1618742886181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224166 + ... + 1813211.

It is an arithmetic number, because the mean of its divisors is an integer number (72612151920).

Almost surely, 2^{1618742886171} is an apocalyptic number.

1618742886171 is a deficient number, since it is larger than the sum of its proper divisors (704845975269).

1618742886171 is a wasteful number, since it uses less digits than its factorization.

1618742886171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037715.

The product of its digits is 7225344, while the sum is 60.

The spelling of 1618742886171 in words is "one trillion, six hundred eighteen billion, seven hundred forty-two million, eight hundred eighty-six thousand, one hundred seventy-one".