77805055 has 8 divisors (see below), whose sum is σ = 93850992. Its totient is φ = 61920768.

The previous prime is 77805053. The next prime is 77805059. The reversal of 77805055 is 55050877.

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 77805055 - 2¹ = 77805053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77805053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39349 + ... + 41278.

It is an arithmetic number, because the mean of its divisors is an integer number (11731374).

Almost surely, 2^77805055 is an apocalyptic number.

77805055 is a deficient number, since it is larger than the sum of its proper divisors (16045937).

77805055 is a wasteful number, since it uses less digits than its factorization.

77805055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80825.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 77805055 is about 8820.7173744543. The cubic root of 77805055 is about 426.9096167479.

The spelling of 77805055 in words is "seventy-seven million, eight hundred five thousand, fifty-five".