77420734813179 has 12 divisors (see below), whose sum is σ = 112542242964736. Its totient is φ = 51285072741552.

The previous prime is 77420734813157. The next prime is 77420734813189. The reversal of 77420734813179 is 97131843702477.

It is a happy number.

77420734813179 is a `hidden beast` number, since 7 + 7 + 4 + 207 + 34 + 81 + 317 + 9 = 666.

It is not a de Polignac number, because 77420734813179 - 2³⁹ = 76870978999291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77420734813109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27395870779 + ... + 27395873604.

Almost surely, 2^{77420734813179} is an apocalyptic number.

77420734813179 is a deficient number, since it is larger than the sum of its proper divisors (35121508151557).

77420734813179 is a wasteful number, since it uses less digits than its factorization.

77420734813179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54791744546 (or 54791744543 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 63.

The spelling of 77420734813179 in words is "seventy-seven trillion, four hundred twenty billion, seven hundred thirty-four million, eight hundred thirteen thousand, one hundred seventy-nine".