6779912487138 has 240 divisors, whose sum is σ = 17826089048064. Its totient is φ = 1920292375680.

The previous prime is 6779912487079. The next prime is 6779912487151. The reversal of 6779912487138 is 8317842199776.

6779912487138 is a `hidden beast` number, since 6 + 7 + 7 + 9 + 9 + 1 + 2 + 487 + 138 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1845876870 + ... + 1845880542.

Almost surely, 2^{6779912487138} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6779912487138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8913044524032).

6779912487138 is an abundant number, since it is smaller than the sum of its proper divisors (11046176560926).

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

6779912487138 is a wasteful number, since it uses less digits than its factorization.

6779912487138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659 (or 5643 counting only the distinct ones).

The product of its digits is 256048128, while the sum is 72.

The spelling of 6779912487138 in words is "six trillion, seven hundred seventy-nine billion, nine hundred twelve million, four hundred eighty-seven thousand, one hundred thirty-eight".