1318679445636 has 240 divisors, whose sum is σ = 4037340827520. Its totient is φ = 367459545600.

The previous prime is 1318679445571. The next prime is 1318679445653. The reversal of 1318679445636 is 6365449768131.

It is a happy number.

1318679445636 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 67 + 9 + 4 + 4 + 563 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 68354680 + ... + 68373968.

It is an arithmetic number, because the mean of its divisors is an integer number (16822253448).

Almost surely, 2^{1318679445636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318679445636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018670413760).

1318679445636 is an abundant number, since it is smaller than the sum of its proper divisors (2718661381884).

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

1318679445636 is a wasteful number, since it uses less digits than its factorization.

1318679445636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20056 (or 20045 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 1318679445636 in words is "one trillion, three hundred eighteen billion, six hundred seventy-nine million, four hundred forty-five thousand, six hundred thirty-six".