77857575355055 has 16 divisors (see below), whose sum is σ = 94612601671680. Its totient is φ = 61497067196448.

The previous prime is 77857575355033. The next prime is 77857575355081. The reversal of 77857575355055 is 55055357575877.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77857575355055 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45389954 + ... + 47074016.

It is an arithmetic number, because the mean of its divisors is an integer number (5913287604480).

Almost surely, 2^{77857575355055} is an apocalyptic number.

77857575355055 is a deficient number, since it is larger than the sum of its proper divisors (16755026316625).

77857575355055 is a wasteful number, since it uses less digits than its factorization.

77857575355055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801190.

The product of its (nonzero) digits is 4501875000, while the sum is 74.

The spelling of 77857575355055 in words is "seventy-seven trillion, eight hundred fifty-seven billion, five hundred seventy-five million, three hundred fifty-five thousand, fifty-five".