77318512 has 20 divisors (see below), whose sum is σ = 150292960. Its totient is φ = 38533248.

The previous prime is 77318491. The next prime is 77318531. The reversal of 77318512 is 21581377.

It is a congruent number.

It is an unprimeable number.

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, 2712 + ... + 12727.

It is an arithmetic number, because the mean of its divisors is an integer number (7514648).

Almost surely, 2^77318512 is an apocalyptic number.

It is an amenable number.

77318512 is a deficient number, since it is larger than the sum of its proper divisors (72974448).

77318512 is a wasteful number, since it uses less digits than its factorization.

77318512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15760 (or 15754 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 77318512 is about 8793.0945633491. The cubic root of 77318512 is about 426.0178822385.

Adding to 77318512 its reverse (21581377), we get a palindrome (98899889).

The spelling of 77318512 in words is "seventy-seven million, three hundred eighteen thousand, five hundred twelve".