77787132660846 has 96 divisors (see below), whose sum is σ = 193889359093248. Its totient is φ = 22078106107200.

The previous prime is 77787132660841. The next prime is 77787132660847. The reversal of 77787132660846 is 64806623178777.

77787132660846 is a `hidden beast` number, since 7 + 7 + 7 + 8 + 7 + 1 + 3 + 2 + 6 + 608 + 4 + 6 = 666.

It is a super-3 number, since 3×77787132660846³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77787132660841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32794821 + ... + 35086671.

It is an arithmetic number, because the mean of its divisors is an integer number (2019680823888).

Almost surely, 2^{77787132660846} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77787132660846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96944679546624).

77787132660846 is an abundant number, since it is smaller than the sum of its proper divisors (116102226432402).

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

77787132660846 is a wasteful number, since it uses less digits than its factorization.

77787132660846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293646 (or 2293643 counting only the distinct ones).

The product of its (nonzero) digits is 796594176, while the sum is 72.

The spelling of 77787132660846 in words is "seventy-seven trillion, seven hundred eighty-seven billion, one hundred thirty-two million, six hundred sixty thousand, eight hundred forty-six".