1318747446431 has 4 divisors (see below), whose sum is σ = 1376084291952. Its totient is φ = 1261410600912.

The previous prime is 1318747446409. The next prime is 1318747446473. The reversal of 1318747446431 is 1346447478131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318747446431 is a prime.

It is a super-2 number, since 2×1318747446431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318747446131) 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, 28668422726 + ... + 28668422771.

It is an arithmetic number, because the mean of its divisors is an integer number (344021072988).

Almost surely, 2^{1318747446431} is an apocalyptic number.

1318747446431 is a deficient number, since it is larger than the sum of its proper divisors (57336845521).

1318747446431 is an equidigital number, since it uses as much as digits as its factorization.

1318747446431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57336845520.

The product of its digits is 5419008, while the sum is 53.

The spelling of 1318747446431 in words is "one trillion, three hundred eighteen billion, seven hundred forty-seven million, four hundred forty-six thousand, four hundred thirty-one".