77542868 has 24 divisors (see below), whose sum is σ = 151180680. Its totient is φ = 34554240.

The previous prime is 77542853. The next prime is 77542901. The reversal of 77542868 is 86824577.

It can be written as a sum of positive squares in 4 ways, for example, as 5326864 + 72216004 = 2308^2 + 8498^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24203 + ... + 27218.

It is an arithmetic number, because the mean of its divisors is an integer number (6299195).

Almost surely, 2^77542868 is an apocalyptic number.

It is an amenable number.

77542868 is a deficient number, since it is larger than the sum of its proper divisors (73637812).

77542868 is a wasteful number, since it uses less digits than its factorization.

77542868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51467 (or 51465 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 77542868 is about 8805.8428330285. The cubic root of 77542868 is about 426.4295446207.

The spelling of 77542868 in words is "seventy-seven million, five hundred forty-two thousand, eight hundred sixty-eight".