1215208326168 has 160 divisors (see below), whose sum is σ = 3604709180160. Its totient is φ = 381674462400.

The previous prime is 1215208326047. The next prime is 1215208326181. The reversal of 1215208326168 is 8616238025121.

1215208326168 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 20 + 8 + 3 + 2 + 616 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 390093 + ... + 1607043.

It is an arithmetic number, because the mean of its divisors is an integer number (22529432376).

Almost surely, 2^{1215208326168} is an apocalyptic number.

1215208326168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215208326168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1802354590080).

1215208326168 is an abundant number, since it is smaller than the sum of its proper divisors (2389500853992).

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

1215208326168 is a wasteful number, since it uses less digits than its factorization.

1215208326168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217059 (or 1217046 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 1215208326168 in words is "one trillion, two hundred fifteen billion, two hundred eight million, three hundred twenty-six thousand, one hundred sixty-eight".