1215818890608 has 320 divisors, whose sum is σ = 3803948531712. Its totient is φ = 327117035520.

The previous prime is 1215818890591. The next prime is 1215818890609. The reversal of 1215818890608 is 8060988185121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215818890609) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 364999503 + ... + 365002833.

Almost surely, 2^{1215818890608} 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 1215818890608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1901974265856).

1215818890608 is an abundant number, since it is smaller than the sum of its proper divisors (2588129641104).

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

1215818890608 is a wasteful number, since it uses less digits than its factorization.

1215818890608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092 (or 4086 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 57.

The spelling of 1215818890608 in words is "one trillion, two hundred fifteen billion, eight hundred eighteen million, eight hundred ninety thousand, six hundred eight".