77541716 has 18 divisors (see below), whose sum is σ = 157853178. Its totient is φ = 33232080.

The previous prime is 77541707. The next prime is 77541721. The reversal of 77541716 is 61714577.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58216900 + 19324816 = 7630^2 + 4396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77541716.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 197615 + ... + 198006.

It is an arithmetic number, because the mean of its divisors is an integer number (8769621).

Almost surely, 2^77541716 is an apocalyptic number.

It is an amenable number.

77541716 is an abundant number, since it is smaller than the sum of its proper divisors (80311462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77541716 is a wasteful number, since it uses less digits than its factorization.

77541716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395639 (or 395630 counting only the distinct ones).

The product of its digits is 41160, while the sum is 38.

The square root of 77541716 is about 8805.7774216704. Note that the first 3 decimals coincide. The cubic root of 77541716 is about 426.4274328887.

The spelling of 77541716 in words is "seventy-seven million, five hundred forty-one thousand, seven hundred sixteen".