215671147652768 has 24 divisors (see below), whose sum is σ = 424667367497268. Its totient is φ = 107819117812224.

The previous prime is 215671147652767. The next prime is 215671147652771. The reversal of 215671147652768 is 867256741176512.

It can be written as a sum of positive squares in 2 ways, for example, as 209812559768464 + 5858587884304 = 14484908^2 + 2420452^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215671147652698 and 215671147652707.

It is not an unprimeable number, because it can be changed into a prime (215671147652767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514037471 + ... + 514456862.

Almost surely, 2^{215671147652768} is an apocalyptic number.

It is an amenable number.

215671147652768 is a deficient number, since it is larger than the sum of its proper divisors (208996219844500).

215671147652768 is a wasteful number, since it uses less digits than its factorization.

215671147652768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028500896 (or 1028500888 counting only the distinct ones).

The product of its digits is 237081600, while the sum is 68.

The spelling of 215671147652768 in words is "two hundred fifteen trillion, six hundred seventy-one billion, one hundred forty-seven million, six hundred fifty-two thousand, seven hundred sixty-eight".