1317478631782 has 16 divisors (see below), whose sum is σ = 2107519782480. Its totient is φ = 615529582848.

The previous prime is 1317478631699. The next prime is 1317478631783. The reversal of 1317478631782 is 2871368747131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317478631783) 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, 139381503 + ... + 139390954.

It is an arithmetic number, because the mean of its divisors is an integer number (131719986405).

Almost surely, 2^{1317478631782} is an apocalyptic number.

1317478631782 is a deficient number, since it is larger than the sum of its proper divisors (790041150698).

1317478631782 is a wasteful number, since it uses less digits than its factorization.

1317478631782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278772615.

The product of its digits is 9483264, while the sum is 58.

The spelling of 1317478631782 in words is "one trillion, three hundred seventeen billion, four hundred seventy-eight million, six hundred thirty-one thousand, seven hundred eighty-two".