1071816439381 has 4 divisors (see below), whose sum is σ = 1106391163264. Its totient is φ = 1037241715500.

The previous prime is 1071816439339. The next prime is 1071816439403. The reversal of 1071816439381 is 1839346181701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1071816439381 - 2¹⁷ = 1071816308309 is a prime.

It is a super-2 number, since 2×1071816439381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071816409381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17287361895 + ... + 17287361956.

It is an arithmetic number, because the mean of its divisors is an integer number (276597790816).

Almost surely, 2^{1071816439381} is an apocalyptic number.

It is an amenable number.

1071816439381 is a deficient number, since it is larger than the sum of its proper divisors (34574723883).

1071816439381 is an equidigital number, since it uses as much as digits as its factorization.

1071816439381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34574723882.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 1071816439381 in words is "one trillion, seventy-one billion, eight hundred sixteen million, four hundred thirty-nine thousand, three hundred eighty-one".