77093808865 has 8 divisors (see below), whose sum is σ = 92856485160. Its totient is φ = 61445770752.

The previous prime is 77093808811. The next prime is 77093808907. The reversal of 77093808865 is 56880839077.

It can be written as a sum of positive squares in 4 ways, for example, as 954529 + 77092854336 = 977^2 + 277656^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77093808865 - 2¹¹ = 77093806817 is a prime.

It is a super-3 number, since 3×77093808865³ (a number of 34 digits) contains 333 as substring.

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, 28658064 + ... + 28660753.

It is an arithmetic number, because the mean of its divisors is an integer number (11607060645).

Almost surely, 2^77093808865 is an apocalyptic number.

It is an amenable number.

77093808865 is a deficient number, since it is larger than the sum of its proper divisors (15762676295).

77093808865 is a wasteful number, since it uses less digits than its factorization.

77093808865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57319091.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 77093808865 in words is "seventy-seven billion, ninety-three million, eight hundred eight thousand, eight hundred sixty-five".