77732164108127 has 4 divisors (see below), whose sum is σ = 81111823417200. Its totient is φ = 74352504799056.

The previous prime is 77732164108117. The next prime is 77732164108141. The reversal of 77732164108127 is 72180146123777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77732164108127 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 (77732164108117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689829654502 + ... + 1689829654547.

It is an arithmetic number, because the mean of its divisors is an integer number (20277955854300).

Almost surely, 2^{77732164108127} is an apocalyptic number.

77732164108127 is a deficient number, since it is larger than the sum of its proper divisors (3379659309073).

77732164108127 is a wasteful number, since it uses less digits than its factorization.

77732164108127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379659309072.

The product of its (nonzero) digits is 5531904, while the sum is 56.

The spelling of 77732164108127 in words is "seventy-seven trillion, seven hundred thirty-two billion, one hundred sixty-four million, one hundred eight thousand, one hundred twenty-seven".