1215406706320 has 160 divisors (see below), whose sum is σ = 3121305580800. Its totient is φ = 438547372032.

The previous prime is 1215406706299. The next prime is 1215406706333. The reversal of 1215406706320 is 236076045121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215406706320.

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, 2029626 + ... + 2559334.

It is an arithmetic number, because the mean of its divisors is an integer number (19508159880).

Almost surely, 2^{1215406706320} is an apocalyptic number.

1215406706320 is a gapful number since it is divisible by the number (10) 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 1215406706320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560652790400).

1215406706320 is an abundant number, since it is smaller than the sum of its proper divisors (1905898874480).

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

1215406706320 is a wasteful number, since it uses less digits than its factorization.

1215406706320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529817 (or 529811 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 1215406706320 in words is "one trillion, two hundred fifteen billion, four hundred six million, seven hundred six thousand, three hundred twenty".