77773312 has 20 divisors (see below), whose sum is σ = 155395746. Its totient is φ = 38886400.

The previous prime is 77773307. The next prime is 77773321. The reversal of 77773312 is 21337777.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77158656 + 614656 = 8784^2 + 784^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75439 + ... + 76462.

Almost surely, 2^77773312 is an apocalyptic number.

It is an amenable number.

77773312 is a deficient number, since it is larger than the sum of its proper divisors (77622434).

77773312 is an equidigital number, since it uses as much as digits as its factorization.

77773312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151919 (or 151903 counting only the distinct ones).

The product of its digits is 43218, while the sum is 37.

The square root of 77773312 is about 8818.9178474459. The cubic root of 77773312 is about 426.8515518176.

The spelling of 77773312 in words is "seventy-seven million, seven hundred seventy-three thousand, three hundred twelve".