215488681548872 has 16 divisors (see below), whose sum is σ = 413895943219500. Its totient is φ = 105116430023680.

The previous prime is 215488681548863. The next prime is 215488681548923. The reversal of 215488681548872 is 278845186884512.

It can be written as a sum of positive squares in 2 ways, for example, as 215475800660836 + 12880888036 = 14679094^2 + 113494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215488681548793 and 215488681548802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328488843497 + ... + 328488844152.

Almost surely, 2^{215488681548872} is an apocalyptic number.

It is an amenable number.

215488681548872 is a deficient number, since it is larger than the sum of its proper divisors (198407261670628).

215488681548872 is a wasteful number, since it uses less digits than its factorization.

215488681548872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656977687696 (or 656977687692 counting only the distinct ones).

The product of its digits is 2202009600, while the sum is 77.

The spelling of 215488681548872 in words is "two hundred fifteen trillion, four hundred eighty-eight billion, six hundred eighty-one million, five hundred forty-eight thousand, eight hundred seventy-two".