77942864923 has 8 divisors (see below), whose sum is σ = 97175520000. Its totient is φ = 60734699880.

The previous prime is 77942864911. The next prime is 77942864959. The reversal of 77942864923 is 32946824977.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77942864923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77942264923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506122423 + ... + 506122576.

It is an arithmetic number, because the mean of its divisors is an integer number (12146940000).

Almost surely, 2^77942864923 is an apocalyptic number.

77942864923 is a deficient number, since it is larger than the sum of its proper divisors (19232655077).

77942864923 is a wasteful number, since it uses less digits than its factorization.

77942864923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012245017.

The product of its digits is 36578304, while the sum is 61.

The spelling of 77942864923 in words is "seventy-seven billion, nine hundred forty-two million, eight hundred sixty-four thousand, nine hundred twenty-three".