77326315663 has 4 divisors (see below), whose sum is σ = 77330015560. Its totient is φ = 77322615768.

The previous prime is 77326315609. The next prime is 77326315699. The reversal of 77326315663 is 36651362377.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77326315663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77326315603) 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 3 ways as a sum of consecutive naturals, for example, 1818420 + ... + 1860457.

It is an arithmetic number, because the mean of its divisors is an integer number (19332503890).

Almost surely, 2^77326315663 is an apocalyptic number.

77326315663 is a deficient number, since it is larger than the sum of its proper divisors (3699897).

77326315663 is a wasteful number, since it uses less digits than its factorization.

77326315663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699896.

The product of its digits is 2857680, while the sum is 49.

The spelling of 77326315663 in words is "seventy-seven billion, three hundred twenty-six million, three hundred fifteen thousand, six hundred sixty-three".