1515244879872 has 540 divisors, whose sum is σ = 4717358180766. Its totient is φ = 484410654720.

The previous prime is 1515244879867. The next prime is 1515244879891. The reversal of 1515244879872 is 2789784425151.

1515244879872 is a `hidden beast` number, since 1 + 5 + 1 + 52 + 448 + 79 + 8 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1496766283776 + 18478596096 = 1223424^2 + 135936^2 .

Its product of digits (45158400) is a multiple of the sum of its prime divisors (105).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 25682116579 + ... + 25682116637.

Almost surely, 2^{1515244879872} is an apocalyptic number.

1515244879872 is a gapful number since it is divisible by the number (12) 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 1515244879872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358679090383).

1515244879872 is an abundant number, since it is smaller than the sum of its proper divisors (3202113300894).

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

1515244879872 is an frugal number, since it uses more digits than its factorization.

1515244879872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 105 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 63.

The spelling of 1515244879872 in words is "one trillion, five hundred fifteen billion, two hundred forty-four million, eight hundred seventy-nine thousand, eight hundred seventy-two".