77318164021 has 8 divisors (see below), whose sum is σ = 88414974144. Its totient is φ = 66234193440.

The previous prime is 77318164009. The next prime is 77318164073. The reversal of 77318164021 is 12046181377.

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 not a de Polignac number, because 77318164021 - 2¹⁷ = 77318032949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77318167021) 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, 3196975 + ... + 3221068.

It is an arithmetic number, because the mean of its divisors is an integer number (11051871768).

Almost surely, 2^77318164021 is an apocalyptic number.

It is an amenable number.

77318164021 is a deficient number, since it is larger than the sum of its proper divisors (11096810123).

77318164021 is a wasteful number, since it uses less digits than its factorization.

77318164021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6419771.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 77318164021 in words is "seventy-seven billion, three hundred eighteen million, one hundred sixty-four thousand, twenty-one".