77445916 has 24 divisors (see below), whose sum is σ = 137281536. Its totient is φ = 38226480.

The previous prime is 77445911. The next prime is 77445923. The reversal of 77445916 is 61954477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77445911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127285 + ... + 127891.

It is an arithmetic number, because the mean of its divisors is an integer number (5720064).

Almost surely, 2^77445916 is an apocalyptic number.

It is an amenable number.

77445916 is a deficient number, since it is larger than the sum of its proper divisors (59835620).

77445916 is a wasteful number, since it uses less digits than its factorization.

77445916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 967 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 77445916 is about 8800.3361299441. The cubic root of 77445916 is about 426.2517486018.

The spelling of 77445916 in words is "seventy-seven million, four hundred forty-five thousand, nine hundred sixteen".