77645044 has 12 divisors (see below), whose sum is σ = 136025568. Its totient is φ = 38780600.

The previous prime is 77645017. The next prime is 77645059. The reversal of 77645044 is 44054677.

It is a junction number, because it is equal to n+sod(n) for n = 77644994 and 77645012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6112 + ... + 13879.

It is an arithmetic number, because the mean of its divisors is an integer number (11335464).

Almost surely, 2^77645044 is an apocalyptic number.

It is an amenable number.

77645044 is a deficient number, since it is larger than the sum of its proper divisors (58380524).

77645044 is a wasteful number, since it uses less digits than its factorization.

77645044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20966 (or 20964 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 77645044 is about 8811.6425256589. The cubic root of 77645044 is about 426.6167603846.

The spelling of 77645044 in words is "seventy-seven million, six hundred forty-five thousand, forty-four".