77728485320434 has 16 divisors (see below), whose sum is σ = 131020590641472. Its totient is φ = 34314916596048.

The previous prime is 77728485320401. The next prime is 77728485320467. The reversal of 77728485320434 is 43402358482777.

It is an interprime number because it is at equal distance from previous prime (77728485320401) and next prime (77728485320467).

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, 64990371744 + ... + 64990372939.

It is an arithmetic number, because the mean of its divisors is an integer number (8188786915092).

Almost surely, 2^{77728485320434} is an apocalyptic number.

77728485320434 is a deficient number, since it is larger than the sum of its proper divisors (53292105321038).

77728485320434 is a wasteful number, since it uses less digits than its factorization.

77728485320434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129980744721.

The product of its (nonzero) digits is 252887040, while the sum is 64.

The spelling of 77728485320434 in words is "seventy-seven trillion, seven hundred twenty-eight billion, four hundred eighty-five million, three hundred twenty thousand, four hundred thirty-four".