77860885622655 has 16 divisors (see below), whose sum is σ = 126927934299360. Its totient is φ = 40742299897728.

The previous prime is 77860885622623. The next prime is 77860885622687. The reversal of 77860885622655 is 55622658806877.

It is an interprime number because it is at equal distance from previous prime (77860885622623) and next prime (77860885622687).

It is not a de Polignac number, because 77860885622655 - 2⁵ = 77860885622623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48969109660 + ... + 48969111249.

It is an arithmetic number, because the mean of its divisors is an integer number (7932995893710).

Almost surely, 2^{77860885622655} is an apocalyptic number.

77860885622655 is a deficient number, since it is larger than the sum of its proper divisors (49067048676705).

77860885622655 is a wasteful number, since it uses less digits than its factorization.

77860885622655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97938220970.

The product of its (nonzero) digits is 2709504000, while the sum is 75.

The spelling of 77860885622655 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred eighty-five million, six hundred twenty-two thousand, six hundred fifty-five".