77788668307045 has 8 divisors (see below), whose sum is σ = 93347818398360. Its totient is φ = 62229990359040.

The previous prime is 77788668306959. The next prime is 77788668307057. The reversal of 77788668307045 is 54070386688777.

It can be written as a sum of positive squares in 4 ways, for example, as 5687953113249 + 72100715193796 = 2384943^2 + 8491214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77788668307045 - 2⁷ = 77788668306917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117673260 + ... + 118332469.

It is an arithmetic number, because the mean of its divisors is an integer number (11668477299795).

Almost surely, 2^{77788668307045} is an apocalyptic number.

It is an amenable number.

77788668307045 is a deficient number, since it is larger than the sum of its proper divisors (15559150091315).

77788668307045 is a wasteful number, since it uses less digits than its factorization.

77788668307045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236071655.

The product of its (nonzero) digits is 2655313920, while the sum is 76.

The spelling of 77788668307045 in words is "seventy-seven trillion, seven hundred eighty-eight billion, six hundred sixty-eight million, three hundred seven thousand, forty-five".