77542568 has 32 divisors (see below), whose sum is σ = 152919360. Its totient is φ = 36791040.

The previous prime is 77542561. The next prime is 77542583. The reversal of 77542568 is 86524577.

It is not an unprimeable number, because it can be changed into a prime (77542561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22496 + ... + 25712.

It is an arithmetic number, because the mean of its divisors is an integer number (4778730).

Almost surely, 2^77542568 is an apocalyptic number.

It is an amenable number.

77542568 is a deficient number, since it is larger than the sum of its proper divisors (75376792).

77542568 is a wasteful number, since it uses less digits than its factorization.

77542568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377 (or 3373 counting only the distinct ones).

The product of its digits is 470400, while the sum is 44.

The square root of 77542568 is about 8805.8257988675. The cubic root of 77542568 is about 426.4289946925.

Subtracting 77542568 from its reverse (86524577), we obtain a square (8982009 = 2997²).

The spelling of 77542568 in words is "seventy-seven million, five hundred forty-two thousand, five hundred sixty-eight".