1782440442871 has 12 divisors (see below), whose sum is σ = 1959243768216. Its totient is φ = 1620373628720.

The previous prime is 1782440442847. The next prime is 1782440442899.

1782440442871 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1782440442871 - 2⁷ = 1782440442743 is a prime.

It is a super-2 number, since 2×1782440442871² (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 (1782440442971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13578276 + ... + 13708918.

It is an arithmetic number, because the mean of its divisors is an integer number (163270314018).

Almost surely, 2^{1782440442871} is an apocalyptic number.

1782440442871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1782440442871 is a deficient number, since it is larger than the sum of its proper divisors (176803325345).

1782440442871 is a wasteful number, since it uses less digits than its factorization.

1782440442871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243422 (or 243411 counting only the distinct ones).

The product of its (nonzero) digits is 3211264, while the sum is 52.

The spelling of 1782440442871 in words is "one trillion, seven hundred eighty-two billion, four hundred forty million, four hundred forty-two thousand, eight hundred seventy-one".