77728747076070 has 32 divisors (see below), whose sum is σ = 186589840474368. Its totient is φ = 20723127276768.

The previous prime is 77728747076053. The next prime is 77728747076081. The reversal of 77728747076070 is 7067074782777.

It is a junction number, because it is equal to n+sod(n) for n = 77728747075986 and 77728747076004.

It is a congruent number.

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, 283523844 + ... + 283797863.

It is an arithmetic number, because the mean of its divisors is an integer number (5830932514824).

Almost surely, 2^{77728747076070} is an apocalyptic number.

77728747076070 is an abundant number, since it is smaller than the sum of its proper divisors (108861093398298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77728747076070 is a wasteful number, since it uses less digits than its factorization.

77728747076070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567326284.

The product of its (nonzero) digits is 316240512, while the sum is 69.

The spelling of 77728747076070 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred forty-seven million, seventy-six thousand, seventy".