207664181871364 has 27 divisors (see below), whose sum is σ = 379901046343413. Its totient is φ = 99317335167072.

The previous prime is 207664181871337. The next prime is 207664181871427. The reversal of 207664181871364 is 463178181466702.

The square root of 207664181871364 is 14410558.

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

It can be written as a sum of positive squares in only one way, i.e., 32943582122500 + 174720599748864 = 5739650^2 + 13218192^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 207664181871296 and 207664181871305.

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 8 ways as a sum of consecutive naturals, for example, 662729032 + ... + 663042304.

Almost surely, 2^{207664181871364} is an apocalyptic number.

207664181871364 is the 14410558-th square number.

It is an amenable number.

207664181871364 is a deficient number, since it is larger than the sum of its proper divisors (172236864472049).

207664181871364 is an frugal number, since it uses more digits than its factorization.

207664181871364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626596 (or 313298 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 207664181871364 in words is "two hundred seven trillion, six hundred sixty-four billion, one hundred eighty-one million, eight hundred seventy-one thousand, three hundred sixty-four".