318746132640 has 576 divisors, whose sum is σ = 1221266592000. Its totient is φ = 78041677824.

The previous prime is 318746132629. The next prime is 318746132671. The reversal of 318746132640 is 46231647813.

318746132640 is a `hidden beast` number, since 3 + 1 + 8 + 7 + 4 + 613 + 26 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 100580976 + ... + 100584144.

It is an arithmetic number, because the mean of its divisors is an integer number (2120254500).

Almost surely, 2^318746132640 is an apocalyptic number.

318746132640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318746132640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610633296000).

318746132640 is an abundant number, since it is smaller than the sum of its proper divisors (902520459360).

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

318746132640 is a wasteful number, since it uses less digits than its factorization.

318746132640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411 (or 3391 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 318746132640 in words is "three hundred eighteen billion, seven hundred forty-six million, one hundred thirty-two thousand, six hundred forty".