77101581680277 has 32 divisors (see below), whose sum is σ = 128169656100864. Its totient is φ = 40052521876800.

The previous prime is 77101581680257. The next prime is 77101581680303. The reversal of 77101581680277 is 77208618510177.

It is a happy number.

It is not a de Polignac number, because 77101581680277 - 2²⁰ = 77101580631701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77101581680277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77101581680257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39882928 + ... + 41771414.

It is an arithmetic number, because the mean of its divisors is an integer number (4005301753152).

Almost surely, 2^{77101581680277} is an apocalyptic number.

77101581680277 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

77101581680277 is a deficient number, since it is larger than the sum of its proper divisors (51068074420587).

77101581680277 is a wasteful number, since it uses less digits than its factorization.

77101581680277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065249.

The product of its (nonzero) digits is 9219840, while the sum is 60.

The spelling of 77101581680277 in words is "seventy-seven trillion, one hundred one billion, five hundred eighty-one million, six hundred eighty thousand, two hundred seventy-seven".