618536141 has 4 divisors (see below), whose sum is σ = 635253372. Its totient is φ = 601818912.

The previous prime is 618536021. The next prime is 618536159. The reversal of 618536141 is 141635816.

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 398162116 + 220374025 = 19954^2 + 14845^2 .

It is a de Polignac number, because none of the positive numbers 2^k-618536141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618566141) 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, 8358560 + ... + 8358633.

It is an arithmetic number, because the mean of its divisors is an integer number (158813343).

Almost surely, 2^618536141 is an apocalyptic number.

It is an amenable number.

618536141 is a deficient number, since it is larger than the sum of its proper divisors (16717231).

618536141 is a wasteful number, since it uses less digits than its factorization.

618536141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16717230.

The product of its digits is 17280, while the sum is 35.

The square root of 618536141 is about 24870.3868285156. The cubic root of 618536141 is about 852.0302751958.

The spelling of 618536141 in words is "six hundred eighteen million, five hundred thirty-six thousand, one hundred forty-one".