160778564 has 6 divisors (see below), whose sum is σ = 281362494. Its totient is φ = 80389280.

The previous prime is 160778561. The next prime is 160778573. The reversal of 160778564 is 465877061.

It can be written as a sum of positive squares in only one way, i.e., 158558464 + 2220100 = 12592^2 + 1490^2 .

It is not an unprimeable number, because it can be changed into a prime (160778561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20097317 + ... + 20097324.

It is an arithmetic number, because the mean of its divisors is an integer number (46893749).

Almost surely, 2^160778564 is an apocalyptic number.

It is an amenable number.

160778564 is a deficient number, since it is larger than the sum of its proper divisors (120583930).

160778564 is a wasteful number, since it uses less digits than its factorization.

160778564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40194645 (or 40194643 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 160778564 is about 12679.8487372681. The cubic root of 160778564 is about 543.7626604882.

The spelling of 160778564 in words is "one hundred sixty million, seven hundred seventy-eight thousand, five hundred sixty-four".