77656470732339 has 4 divisors (see below), whose sum is σ = 103541960976456. Its totient is φ = 51770980488224.

The previous prime is 77656470732331. The next prime is 77656470732377. The reversal of 77656470732339 is 93323707465677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77656470732339 - 2³ = 77656470732331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77656470732331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12942745122054 + ... + 12942745122059.

It is an arithmetic number, because the mean of its divisors is an integer number (25885490244114).

Almost surely, 2^{77656470732339} is an apocalyptic number.

77656470732339 is a deficient number, since it is larger than the sum of its proper divisors (25885490244117).

77656470732339 is a wasteful number, since it uses less digits than its factorization.

77656470732339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25885490244116.

The product of its (nonzero) digits is 840157920, while the sum is 69.

The spelling of 77656470732339 in words is "seventy-seven trillion, six hundred fifty-six billion, four hundred seventy million, seven hundred thirty-two thousand, three hundred thirty-nine".