78557583055 has 16 divisors (see below), whose sum is σ = 108522515520. Its totient is φ = 53474856192.

The previous prime is 78557583053. The next prime is 78557583061. The reversal of 78557583055 is 55038575587.

It is a cyclic number.

It is not a de Polignac number, because 78557583055 - 2¹ = 78557583053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78557583053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8186820 + ... + 8196409.

It is an arithmetic number, because the mean of its divisors is an integer number (6782657220).

Almost surely, 2^78557583055 is an apocalyptic number.

78557583055 is a deficient number, since it is larger than the sum of its proper divisors (29964932465).

78557583055 is a wasteful number, since it uses less digits than its factorization.

78557583055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16383378.

The product of its (nonzero) digits is 29400000, while the sum is 58.

The spelling of 78557583055 in words is "seventy-eight billion, five hundred fifty-seven million, five hundred eighty-three thousand, fifty-five".