77728464346163 has 4 divisors (see below), whose sum is σ = 77728497973200. Its totient is φ = 77728430719128.

The previous prime is 77728464346151. The next prime is 77728464346171. The reversal of 77728464346163 is 36164346482777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77728464346163 - 2⁴ = 77728464346147 is a prime.

It is a super-2 number, since 2×77728464346163² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77728464346093 and 77728464346102.

It is not an unprimeable number, because it can be changed into a prime (77728464346193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13068188 + ... + 18061961.

It is an arithmetic number, because the mean of its divisors is an integer number (19432124493300).

Almost surely, 2^{77728464346163} is an apocalyptic number.

77728464346163 is a deficient number, since it is larger than the sum of its proper divisors (33627037).

77728464346163 is a wasteful number, since it uses less digits than its factorization.

77728464346163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33627036.

The product of its digits is 682795008, while the sum is 68.

The spelling of 77728464346163 in words is "seventy-seven trillion, seven hundred twenty-eight billion, four hundred sixty-four million, three hundred forty-six thousand, one hundred sixty-three".