77164856809 has 8 divisors (see below), whose sum is σ = 78229020672. Its totient is φ = 76100885280.

The previous prime is 77164856767. The next prime is 77164856831. The reversal of 77164856809 is 90865846177.

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 77164856809 - 2⁹ = 77164856297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77164850809) 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, 883272 + ... + 966694.

It is an arithmetic number, because the mean of its divisors is an integer number (9778627584).

Almost surely, 2^77164856809 is an apocalyptic number.

It is an amenable number.

77164856809 is a deficient number, since it is larger than the sum of its proper divisors (1064163863).

77164856809 is a wasteful number, since it uses less digits than its factorization.

77164856809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96167.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 77164856809 in words is "seventy-seven billion, one hundred sixty-four million, eight hundred fifty-six thousand, eight hundred nine".