318540521650 has 96 divisors (see below), whose sum is σ = 643056498000. Its totient is φ = 116695987200.

The previous prime is 318540521639. The next prime is 318540521653. The reversal of 318540521650 is 56125045813.

It can be written as a sum of positive squares in 24 ways, for example, as 1354166401 + 317186355249 = 36799^2 + 563193^2 .

It is not an unprimeable number, because it can be changed into a prime (318540521653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156992836 + ... + 156994864.

Almost surely, 2^318540521650 is an apocalyptic number.

318540521650 is an abundant number, since it is smaller than the sum of its proper divisors (324515976350).

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

318540521650 is a wasteful number, since it uses less digits than its factorization.

318540521650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 318540521650 in words is "three hundred eighteen billion, five hundred forty million, five hundred twenty-one thousand, six hundred fifty".