207806516164 has 81 divisors (see below), whose sum is σ = 400293383637. Its totient is φ = 94351665408.

The previous prime is 207806516161. The next prime is 207806516171. The reversal of 207806516164 is 461615608702.

The square root of 207806516164 is 455858.

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

It can be written as a sum of positive squares in 13 ways, for example, as 120379853764 + 87426662400 = 346958^2 + 295680^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207806516161) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1054855314 + ... + 1054855510.

Almost surely, 2^207806516164 is an apocalyptic number.

207806516164 is the 455858-th square number.

It is an amenable number.

207806516164 is a deficient number, since it is larger than the sum of its proper divisors (192486867473).

207806516164 is an equidigital number, since it uses as much as digits as its factorization.

207806516164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 207806516164 in words is "two hundred seven billion, eight hundred six million, five hundred sixteen thousand, one hundred sixty-four".