618404361894 has 24 divisors (see below), whose sum is σ = 1461683037672. Its totient is φ = 187395261120.

The previous prime is 618404361871. The next prime is 618404361899. The reversal of 618404361894 is 498163404816.

618404361894 is a `hidden beast` number, since 6 + 18 + 4 + 0 + 4 + 3 + 618 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 618404361894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618404361899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561626979 + ... + 1561627374.

It is an arithmetic number, because the mean of its divisors is an integer number (60903459903).

Almost surely, 2^618404361894 is an apocalyptic number.

618404361894 is an abundant number, since it is smaller than the sum of its proper divisors (843278675778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618404361894 is a wasteful number, since it uses less digits than its factorization.

618404361894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123254372 (or 3123254369 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 618404361894 in words is "six hundred eighteen billion, four hundred four million, three hundred sixty-one thousand, eight hundred ninety-four".