77920006839571 has 8 divisors (see below), whose sum is σ = 83921727728384. Its totient is φ = 71919410837760.

The previous prime is 77920006839557. The next prime is 77920006839641. The reversal of 77920006839571 is 17593860002977.

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

It is a cyclic number.

It is not a de Polignac number, because 77920006839571 - 2⁵ = 77920006839539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77920006839271) 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, 281077875 + ... + 281354956.

It is an arithmetic number, because the mean of its divisors is an integer number (10490215966048).

Almost surely, 2^{77920006839571} is an apocalyptic number.

77920006839571 is a deficient number, since it is larger than the sum of its proper divisors (6001720888813).

77920006839571 is a wasteful number, since it uses less digits than its factorization.

77920006839571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562443501.

The product of its (nonzero) digits is 40007520, while the sum is 64.

The spelling of 77920006839571 in words is "seventy-seven trillion, nine hundred twenty billion, six million, eight hundred thirty-nine thousand, five hundred seventy-one".