77378882127 has 4 divisors (see below), whose sum is σ = 103171842840. Its totient is φ = 51585921416.

The previous prime is 77378882123. The next prime is 77378882171. The reversal of 77378882127 is 72128887377.

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 77378882127 - 2² = 77378882123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77378882123) 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, 12896480352 + ... + 12896480357.

It is an arithmetic number, because the mean of its divisors is an integer number (25792960710).

Almost surely, 2^77378882127 is an apocalyptic number.

77378882127 is a deficient number, since it is larger than the sum of its proper divisors (25792960713).

77378882127 is a wasteful number, since it uses less digits than its factorization.

77378882127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25792960712.

The product of its digits is 14751744, while the sum is 60.

The spelling of 77378882127 in words is "seventy-seven billion, three hundred seventy-eight million, eight hundred eighty-two thousand, one hundred twenty-seven".