77445716 has 6 divisors (see below), whose sum is σ = 135530010. Its totient is φ = 38722856.

The previous prime is 77445713. The next prime is 77445733. The reversal of 77445716 is 61754477.

It can be written as a sum of positive squares in only one way, i.e., 57820816 + 19624900 = 7604^2 + 4430^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77445713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9680711 + ... + 9680718.

It is an arithmetic number, because the mean of its divisors is an integer number (22588335).

Almost surely, 2^77445716 is an apocalyptic number.

It is an amenable number.

77445716 is a deficient number, since it is larger than the sum of its proper divisors (58084294).

77445716 is a wasteful number, since it uses less digits than its factorization.

77445716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19361433 (or 19361431 counting only the distinct ones).

The product of its digits is 164640, while the sum is 41.

The square root of 77445716 is about 8800.3247667345. The cubic root of 77445716 is about 426.2513816773.

The spelling of 77445716 in words is "seventy-seven million, four hundred forty-five thousand, seven hundred sixteen".