215126445531265 has 16 divisors (see below), whose sum is σ = 261253590578640. Its totient is φ = 170036234311680.

The previous prime is 215126445531259. The next prime is 215126445531299. The reversal of 215126445531265 is 562135544621512.

It can be written as a sum of positive squares in 8 ways, for example, as 4285794286656 + 210840651244609 = 2070216^2 + 14520353^2 .

It is not a de Polignac number, because 215126445531265 - 2⁹ = 215126445530753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185787606 + ... + 186941935.

It is an arithmetic number, because the mean of its divisors is an integer number (16328349411165).

Almost surely, 2^{215126445531265} is an apocalyptic number.

It is an amenable number.

215126445531265 is a deficient number, since it is larger than the sum of its proper divisors (46127145047375).

215126445531265 is a wasteful number, since it uses less digits than its factorization.

215126445531265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372730932.

The product of its digits is 8640000, while the sum is 52.

The spelling of 215126445531265 in words is "two hundred fifteen trillion, one hundred twenty-six billion, four hundred forty-five million, five hundred thirty-one thousand, two hundred sixty-five".