77312645905 has 8 divisors (see below), whose sum is σ = 101209281984. Its totient is φ = 56227378800.

The previous prime is 77312645831. The next prime is 77312645933. The reversal of 77312645905 is 50954621377.

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

It is not a de Polignac number, because 77312645905 - 2¹⁷ = 77312514833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702842181 + ... + 702842290.

It is an arithmetic number, because the mean of its divisors is an integer number (12651160248).

Almost surely, 2^77312645905 is an apocalyptic number.

It is an amenable number.

77312645905 is a deficient number, since it is larger than the sum of its proper divisors (23896636079).

77312645905 is a wasteful number, since it uses less digits than its factorization.

77312645905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405684487.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 77312645905 in words is "seventy-seven billion, three hundred twelve million, six hundred forty-five thousand, nine hundred five".