1318721679426 has 8 divisors (see below), whose sum is σ = 2637443358864. Its totient is φ = 439573893140.

The previous prime is 1318721679421. The next prime is 1318721679433. The reversal of 1318721679426 is 6249761278131.

It is a sphenic number, since it is the product of 3 distinct primes.

1318721679426 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1318721679421) 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, 109893473280 + ... + 109893473291.

It is an arithmetic number, because the mean of its divisors is an integer number (329680419858).

Almost surely, 2^{1318721679426} is an apocalyptic number.

1318721679426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1318721679426 is a wasteful number, since it uses less digits than its factorization.

1318721679426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219786946576.

The product of its digits is 6096384, while the sum is 57.

The spelling of 1318721679426 in words is "one trillion, three hundred eighteen billion, seven hundred twenty-one million, six hundred seventy-nine thousand, four hundred twenty-six".