77408717834 has 32 divisors (see below), whose sum is σ = 137004220416. Its totient is φ = 32099632560.

The previous prime is 77408717819. The next prime is 77408717917. The reversal of 77408717834 is 43871780477.

It is a self number, because there is not a number n which added to its sum of digits gives 77408717834.

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, 3585797 + ... + 3607319.

It is an arithmetic number, because the mean of its divisors is an integer number (4281381888).

Almost surely, 2^77408717834 is an apocalyptic number.

77408717834 is a deficient number, since it is larger than the sum of its proper divisors (59595502582).

77408717834 is a wasteful number, since it uses less digits than its factorization.

77408717834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29850.

The product of its (nonzero) digits is 7375872, while the sum is 56.

The spelling of 77408717834 in words is "seventy-seven billion, four hundred eight million, seven hundred seventeen thousand, eight hundred thirty-four".