1171642382538 has 16 divisors (see below), whose sum is σ = 2343340320096. Its totient is φ = 390538201680.

The previous prime is 1171642382531. The next prime is 1171642382549. The reversal of 1171642382538 is 8352832461711.

It is a super-2 number, since 2×1171642382538² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1171642382531) 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, 2038081 + ... + 2548932.

It is an arithmetic number, because the mean of its divisors is an integer number (146458770006).

Almost surely, 2^{1171642382538} is an apocalyptic number.

1171642382538 is an abundant number, since it is smaller than the sum of its proper divisors (1171697937558).

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

1171642382538 is a wasteful number, since it uses less digits than its factorization.

1171642382538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629589.

The product of its digits is 1935360, while the sum is 51.

The spelling of 1171642382538 in words is "one trillion, one hundred seventy-one billion, six hundred forty-two million, three hundred eighty-two thousand, five hundred thirty-eight".