318555449753 has 4 divisors (see below), whose sum is σ = 318557326080. Its totient is φ = 318553573428.

The previous prime is 318555449747. The next prime is 318555449767. The reversal of 318555449753 is 357944555813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 357944555813 = 13 ⋅27534196601.

It is a cyclic number.

It is not a de Polignac number, because 318555449753 - 2⁸ = 318555449497 is a prime.

It is a super-2 number, since 2×318555449753² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 318555449692 and 318555449701.

It is not an unprimeable number, because it can be changed into a prime (318555449353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655013 + ... + 1032546.

It is an arithmetic number, because the mean of its divisors is an integer number (79639331520).

Almost surely, 2^318555449753 is an apocalyptic number.

It is an amenable number.

318555449753 is a deficient number, since it is larger than the sum of its proper divisors (1876327).

318555449753 is a wasteful number, since it uses less digits than its factorization.

318555449753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876326.

The product of its digits is 45360000, while the sum is 59.

The spelling of 318555449753 in words is "three hundred eighteen billion, five hundred fifty-five million, four hundred forty-nine thousand, seven hundred fifty-three".