618536578408211 has 4 divisors (see below), whose sum is σ = 620722220028312. Its totient is φ = 616350936788112.

The previous prime is 618536578408171. The next prime is 618536578408219. The reversal of 618536578408211 is 112804875635816.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618536578408211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618536578408219) 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, 1092820809626 + ... + 1092820810191.

It is an arithmetic number, because the mean of its divisors is an integer number (155180555007078).

Almost surely, 2^{618536578408211} is an apocalyptic number.

618536578408211 is a deficient number, since it is larger than the sum of its proper divisors (2185641620101).

618536578408211 is a wasteful number, since it uses less digits than its factorization.

618536578408211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185641620100.

The product of its (nonzero) digits is 77414400, while the sum is 65.

The spelling of 618536578408211 in words is "six hundred eighteen trillion, five hundred thirty-six billion, five hundred seventy-eight million, four hundred eight thousand, two hundred eleven".