1315221811368 has 128 divisors (see below), whose sum is σ = 3653841312000. Its totient is φ = 392396804096.

The previous prime is 1315221811357. The next prime is 1315221811441. The reversal of 1315221811368 is 8631181225131.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1218358 + ... + 2028506.

It is an arithmetic number, because the mean of its divisors is an integer number (28545635250).

Almost surely, 2^{1315221811368} 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 1315221811368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1826920656000).

1315221811368 is an abundant number, since it is smaller than the sum of its proper divisors (2338619500632).

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

1315221811368 is a wasteful number, since it uses less digits than its factorization.

1315221811368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810371 (or 810367 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The spelling of 1315221811368 in words is "one trillion, three hundred fifteen billion, two hundred twenty-one million, eight hundred eleven thousand, three hundred sixty-eight".