77405682705 has 16 divisors (see below), whose sum is σ = 133375945920. Its totient is φ = 38107412928.

The previous prime is 77405682691. The next prime is 77405682733. The reversal of 77405682705 is 50728650477.

It is not a de Polignac number, because 77405682705 - 2⁷ = 77405682577 is a prime.

It is a super-2 number, since 2×77405682705² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198475915 + ... + 198476304.

It is an arithmetic number, because the mean of its divisors is an integer number (8335996620).

Almost surely, 2^77405682705 is an apocalyptic number.

It is an amenable number.

77405682705 is a deficient number, since it is larger than the sum of its proper divisors (55970263215).

77405682705 is a wasteful number, since it uses less digits than its factorization.

77405682705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396952240.

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 77405682705 in words is "seventy-seven billion, four hundred five million, six hundred eighty-two thousand, seven hundred five".