215542040000000 has 640 divisors, whose sum is σ = 618775950304512. Its totient is φ = 73474560000000.

The previous prime is 215542039999981. The next prime is 215542040000039. The reversal of 215542040000000 is 40245512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50679997874 + ... + 50680002126.

Almost surely, 2^{215542040000000} is an apocalyptic number.

215542040000000 is a gapful number since it is divisible by the number (20) 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 215542040000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309387975152256).

215542040000000 is an abundant number, since it is smaller than the sum of its proper divisors (403233910304512).

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

215542040000000 is an frugal number, since it uses more digits than its factorization.

215542040000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494 (or 4448 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 215542040000000 its reverse (40245512), we get a palindrome (215542080245512).

The spelling of 215542040000000 in words is "two hundred fifteen trillion, five hundred forty-two billion, forty million", and thus it is an aban number.