618841878 has 32 divisors (see below), whose sum is σ = 1263918816. Its totient is φ = 201950208.

The previous prime is 618841877. The next prime is 618841879. The reversal of 618841878 is 878148816.

It is an interprime number because it is at equal distance from previous prime (618841877) and next prime (618841879).

It is a self number, because there is not a number n which added to its sum of digits gives 618841878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618841877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54850 + ... + 65162.

It is an arithmetic number, because the mean of its divisors is an integer number (39497463).

Almost surely, 2^618841878 is an apocalyptic number.

618841878 is an abundant number, since it is smaller than the sum of its proper divisors (645076938).

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

618841878 is a wasteful number, since it uses less digits than its factorization.

618841878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528.

The product of its digits is 688128, while the sum is 51.

The square root of 618841878 is about 24876.5326764001. The cubic root of 618841878 is about 852.1706357742.

The spelling of 618841878 in words is "six hundred eighteen million, eight hundred forty-one thousand, eight hundred seventy-eight".