318929008644 has 81 divisors (see below), whose sum is σ = 820145937429. Its totient is φ = 104499119520.

The previous prime is 318929008639. The next prime is 318929008663. The reversal of 318929008644 is 446800929813.

The square root of 318929008644 is 564738.

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., 10370978244 + 308558030400 = 101838^2 + 555480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 206693337 + ... + 206694879.

Almost surely, 2^318929008644 is an apocalyptic number.

318929008644 is the 564738-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318929008644

318929008644 is an abundant number, since it is smaller than the sum of its proper divisors (501216928785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318929008644 is an equidigital number, since it uses as much as digits as its factorization.

318929008644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 318929008644 in words is "three hundred eighteen billion, nine hundred twenty-nine million, eight thousand, six hundred forty-four".