211512170597764 has 27 divisors (see below), whose sum is σ = 370540955391663. Its totient is φ = 105643446216672.

The previous prime is 211512170597747. The next prime is 211512170597771. The reversal of 211512170597764 is 467795071215112.

The square root of 211512170597764 is 14543458.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 261061727364 + 211251108870400 = 510942^2 + 14534480^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211512170597699 and 211512170597708.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31791995862 + ... + 31792002514.

Almost surely, 2^{211512170597764} is an apocalyptic number.

211512170597764 is the 14543458-th square number.

It is an amenable number.

211512170597764 is a deficient number, since it is larger than the sum of its proper divisors (159028784793899).

211512170597764 is an frugal number, since it uses more digits than its factorization.

211512170597764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15496 (or 7748 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 58.

The spelling of 211512170597764 in words is "two hundred eleven trillion, five hundred twelve billion, one hundred seventy million, five hundred ninety-seven thousand, seven hundred sixty-four".