6781418672 has 20 divisors (see below), whose sum is σ = 15015998736. Its totient is φ = 2906322240.

The previous prime is 6781418663. The next prime is 6781418681. The reversal of 6781418672 is 2768141876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6781418663) and next prime (6781418681).

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6781418672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30274079 + ... + 30274302.

Almost surely, 2^6781418672 is an apocalyptic number.

It is an amenable number.

6781418672 is an abundant number, since it is smaller than the sum of its proper divisors (8234580064).

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

6781418672 is a wasteful number, since it uses less digits than its factorization.

6781418672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60548396 (or 60548390 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 6781418672 is about 82349.3695907868. The cubic root of 6781418672 is about 1892.8092627523.

The spelling of 6781418672 in words is "six billion, seven hundred eighty-one million, four hundred eighteen thousand, six hundred seventy-two".