15878981485224 has 288 divisors, whose sum is σ = 50942353392840. Its totient is φ = 4438570245120.

The previous prime is 15878981485219. The next prime is 15878981485261. The reversal of 15878981485224 is 42258418987851.

It is a happy number.

15878981485224 is a `hidden beast` number, since 1 + 5 + 8 + 7 + 8 + 98 + 1 + 4 + 8 + 522 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12595528764324 + 3283452720900 = 3549018^2 + 1812030^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 164512722 + ... + 164609214.

Almost surely, 2^{15878981485224} 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 15878981485224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25471176696420).

15878981485224 is an abundant number, since it is smaller than the sum of its proper divisors (35063371907616).

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

15878981485224 is a wasteful number, since it uses less digits than its factorization.

15878981485224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97993 (or 97975 counting only the distinct ones).

The product of its digits is 412876800, while the sum is 72.

The spelling of 15878981485224 in words is "fifteen trillion, eight hundred seventy-eight billion, nine hundred eighty-one million, four hundred eighty-five thousand, two hundred twenty-four".