1215076805120 has 160 divisors (see below), whose sum is σ = 2950969157136. Its totient is φ = 479792332800.

The previous prime is 1215076805119. The next prime is 1215076805123. The reversal of 1215076805120 is 215086705121.

It can be written as a sum of positive squares in 8 ways, for example, as 221562255616 + 993514549504 = 470704^2 + 996752^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (1215076805123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63470750 + ... + 63489890.

Almost surely, 2^{1215076805120} is an apocalyptic number.

1215076805120 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 1215076805120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475484578568).

1215076805120 is an abundant number, since it is smaller than the sum of its proper divisors (1735892352016).

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

1215076805120 is a wasteful number, since it uses less digits than its factorization.

1215076805120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19482 (or 19466 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 38.

Subtracting from 1215076805120 its reverse (215086705121), we obtain a palindrome (999990099999).

The spelling of 1215076805120 in words is "one trillion, two hundred fifteen billion, seventy-six million, eight hundred five thousand, one hundred twenty".