318671657253 has 48 divisors (see below), whose sum is σ = 486393336000. Its totient is φ = 201050511264.

The previous prime is 318671657221. The next prime is 318671657299. The reversal of 318671657253 is 352756176813.

318671657253 is a `hidden beast` number, since 3 + 1 + 8 + 6 + 7 + 16 + 572 + 53 = 666.

It is not a de Polignac number, because 318671657253 - 2⁵ = 318671657221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 318671657253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318671657203) 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, 73272523 + ... + 73276871.

It is an arithmetic number, because the mean of its divisors is an integer number (10133194500).

Almost surely, 2^318671657253 is an apocalyptic number.

It is an amenable number.

318671657253 is a deficient number, since it is larger than the sum of its proper divisors (167721678747).

318671657253 is a wasteful number, since it uses less digits than its factorization.

318671657253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5558 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 318671657253 in words is "three hundred eighteen billion, six hundred seventy-one million, six hundred fifty-seven thousand, two hundred fifty-three".