318212177940 has 48 divisors (see below), whose sum is σ = 989993444160. Its totient is φ = 84856580640.

The previous prime is 318212177929. The next prime is 318212177971. The reversal of 318212177940 is 49771212813.

318212177940 is a `hidden beast` number, since 318 + 212 + 17 + 79 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294640366 + ... + 294641445.

It is an arithmetic number, because the mean of its divisors is an integer number (20624863420).

Almost surely, 2^318212177940 is an apocalyptic number.

318212177940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

318212177940 is an abundant number, since it is smaller than the sum of its proper divisors (671781266220).

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

318212177940 is a wasteful number, since it uses less digits than its factorization.

318212177940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589281829 (or 589281821 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 318212177940 in words is "three hundred eighteen billion, two hundred twelve million, one hundred seventy-seven thousand, nine hundred forty".