77920128001 has 8 divisors (see below), whose sum is σ = 78195349440. Its totient is φ = 77645198448.

The previous prime is 77920127959. The next prime is 77920128017. The reversal of 77920128001 is 10082102977.

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 77920128001 - 2⁹ = 77920127489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77920128071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468955 + ... + 612991.

It is an arithmetic number, because the mean of its divisors is an integer number (9774418680).

Almost surely, 2^77920128001 is an apocalyptic number.

It is an amenable number.

77920128001 is a deficient number, since it is larger than the sum of its proper divisors (275221439).

77920128001 is a wasteful number, since it uses less digits than its factorization.

77920128001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145943.

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 77920128001 in words is "seventy-seven billion, nine hundred twenty million, one hundred twenty-eight thousand, one".