618458958361 has 4 divisors (see below), whose sum is σ = 618462933300. Its totient is φ = 618454983424.

The previous prime is 618458958353. The next prime is 618458958373. The reversal of 618458958361 is 163859854816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 370340405136 + 248118553225 = 608556^2 + 498115^2 .

It is a cyclic number.

It is not a de Polignac number, because 618458958361 - 2³ = 618458958353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 618458958293 and 618458958302.

It is not an unprimeable number, because it can be changed into a prime (618458958301) 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, 1744156 + ... + 2068573.

It is an arithmetic number, because the mean of its divisors is an integer number (154615733325).

Almost surely, 2^618458958361 is an apocalyptic number.

It is an amenable number.

618458958361 is a deficient number, since it is larger than the sum of its proper divisors (3974939).

618458958361 is a wasteful number, since it uses less digits than its factorization.

618458958361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974938.

The product of its digits is 49766400, while the sum is 64.

The spelling of 618458958361 in words is "six hundred eighteen billion, four hundred fifty-eight million, nine hundred fifty-eight thousand, three hundred sixty-one".