77454644 has 12 divisors (see below), whose sum is σ = 135735684. Its totient is φ = 38673024.

The previous prime is 77454631. The next prime is 77454673. The reversal of 77454644 is 44645477.

It can be written as a sum of positive squares in 2 ways, for example, as 48832144 + 28622500 = 6988^2 + 5350^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10277 + ... + 16140.

It is an arithmetic number, because the mean of its divisors is an integer number (11311307).

Almost surely, 2^77454644 is an apocalyptic number.

It is an amenable number.

77454644 is a deficient number, since it is larger than the sum of its proper divisors (58281040).

77454644 is a wasteful number, since it uses less digits than its factorization.

77454644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27154 (or 27152 counting only the distinct ones).

The product of its digits is 376320, while the sum is 41.

The square root of 77454644 is about 8800.8320061231. The cubic root of 77454644 is about 426.2677605738.

The spelling of 77454644 in words is "seventy-seven million, four hundred fifty-four thousand, six hundred forty-four".