77344817506 has 8 divisors (see below), whose sum is σ = 126564246864. Its totient is φ = 35156735220.

The previous prime is 77344817489. The next prime is 77344817507. The reversal of 77344817506 is 60571844377.

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

It is not an unprimeable number, because it can be changed into a prime (77344817507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757836740 + ... + 1757836783.

It is an arithmetic number, because the mean of its divisors is an integer number (15820530858).

Almost surely, 2^77344817506 is an apocalyptic number.

77344817506 is a deficient number, since it is larger than the sum of its proper divisors (49219429358).

77344817506 is a wasteful number, since it uses less digits than its factorization.

77344817506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515673536.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 77344817506 in words is "seventy-seven billion, three hundred forty-four million, eight hundred seventeen thousand, five hundred six".