77105078705 has 16 divisors (see below), whose sum is σ = 98246376144. Its totient is φ = 57891102720.

The previous prime is 77105078689. The next prime is 77105078717. The reversal of 77105078705 is 50787050177.

It can be written as a sum of positive squares in 8 ways, for example, as 11669056 + 77093409649 = 3416^2 + 277657^2 .

It is not a de Polignac number, because 77105078705 - 2⁴ = 77105078689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77105078705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1254866 + ... + 1314875.

It is an arithmetic number, because the mean of its divisors is an integer number (6140398509).

Almost surely, 2^77105078705 is an apocalyptic number.

It is an amenable number.

77105078705 is a deficient number, since it is larger than the sum of its proper divisors (21141297439).

77105078705 is a wasteful number, since it uses less digits than its factorization.

77105078705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570116.

The product of its (nonzero) digits is 480200, while the sum is 47.

The spelling of 77105078705 in words is "seventy-seven billion, one hundred five million, seventy-eight thousand, seven hundred five".