77785345 has 16 divisors (see below), whose sum is σ = 102409920. Its totient is φ = 56248000.

The previous prime is 77785327. The next prime is 77785349. The reversal of 77785345 is 54358777.

It is not a de Polignac number, because 77785345 - 2¹¹ = 77783297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77785295 and 77785304.

It is not an unprimeable number, because it can be changed into a prime (77785349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5895 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (6400620).

Almost surely, 2^77785345 is an apocalyptic number.

It is an amenable number.

77785345 is a deficient number, since it is larger than the sum of its proper divisors (24624575).

77785345 is a wasteful number, since it uses less digits than its factorization.

77785345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096.

The product of its digits is 823200, while the sum is 46.

The square root of 77785345 is about 8819.6000476212. The cubic root of 77785345 is about 426.8735646809.

The spelling of 77785345 in words is "seventy-seven million, seven hundred eighty-five thousand, three hundred forty-five".