2787116161878 has 32 divisors (see below), whose sum is σ = 6193829358720. Its totient is φ = 929003037480.

The previous prime is 2787116161877. The next prime is 2787116161883. The reversal of 2787116161878 is 8781616117872.

2787116161878 is a `hidden beast` number, since 2 + 7 + 8 + 7 + 1 + 1 + 6 + 1 + 618 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787116161877) 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, 446893 + ... + 2402903.

It is an arithmetic number, because the mean of its divisors is an integer number (193557167460).

Almost surely, 2^{2787116161878} is an apocalyptic number.

2787116161878 is an abundant number, since it is smaller than the sum of its proper divisors (3406713196842).

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

2787116161878 is a wasteful number, since it uses less digits than its factorization.

2787116161878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982409 (or 1982403 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 63.

The spelling of 2787116161878 in words is "two trillion, seven hundred eighty-seven billion, one hundred sixteen million, one hundred sixty-one thousand, eight hundred seventy-eight".