77989795723 has 8 divisors (see below), whose sum is σ = 89134152192. Its totient is φ = 66846178536.

The previous prime is 77989795703. The next prime is 77989795727. The reversal of 77989795723 is 32759798977.

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-77989795723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77989795727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63486 + ... + 400012.

It is an arithmetic number, because the mean of its divisors is an integer number (11141769024).

Almost surely, 2^77989795723 is an apocalyptic number.

77989795723 is a deficient number, since it is larger than the sum of its proper divisors (11144356469).

77989795723 is a wasteful number, since it uses less digits than its factorization.

77989795723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369641.

The product of its digits is 420078960, while the sum is 73.

The spelling of 77989795723 in words is "seventy-seven billion, nine hundred eighty-nine million, seven hundred ninety-five thousand, seven hundred twenty-three".