1071182861638 has 4 divisors (see below), whose sum is σ = 1606774292460. Its totient is φ = 535591430818.

The previous prime is 1071182861603. The next prime is 1071182861647. The reversal of 1071182861638 is 8361682811701.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1071182861638² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267795715408 + ... + 267795715411.

It is an arithmetic number, because the mean of its divisors is an integer number (401693573115).

Almost surely, 2^{1071182861638} is an apocalyptic number.

1071182861638 is a deficient number, since it is larger than the sum of its proper divisors (535591430822).

1071182861638 is an equidigital number, since it uses as much as digits as its factorization.

1071182861638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535591430821.

The product of its (nonzero) digits is 774144, while the sum is 52.

The spelling of 1071182861638 in words is "one trillion, seventy-one billion, one hundred eighty-two million, eight hundred sixty-one thousand, six hundred thirty-eight".