6418813778740 has 48 divisors (see below), whose sum is σ = 14842348041024. Its totient is φ = 2312299942400.

The previous prime is 6418813778719. The next prime is 6418813778747. The reversal of 6418813778740 is 478773188146.

It is a super-2 number, since 2×6418813778740² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418813778747) 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, 136314901 + ... + 136361980.

It is an arithmetic number, because the mean of its divisors is an integer number (309215584188).

Almost surely, 2^{6418813778740} is an apocalyptic number.

It is an amenable number.

6418813778740 is an abundant number, since it is smaller than the sum of its proper divisors (8423534262284).

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

6418813778740 is a wasteful number, since it uses less digits than its factorization.

6418813778740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272677008 (or 272677006 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 64.

The spelling of 6418813778740 in words is "six trillion, four hundred eighteen billion, eight hundred thirteen million, seven hundred seventy-eight thousand, seven hundred forty".