77112644 has 24 divisors (see below), whose sum is σ = 156088128. Its totient is φ = 32649120.

The previous prime is 77112643. The next prime is 77112647. The reversal of 77112644 is 44621177.

It is a self number, because there is not a number n which added to its sum of digits gives 77112644.

It is not an unprimeable number, because it can be changed into a prime (77112641) 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, 14267 + ... + 18914.

It is an arithmetic number, because the mean of its divisors is an integer number (6503672).

Almost surely, 2^77112644 is an apocalyptic number.

It is an amenable number.

77112644 is an abundant number, since it is smaller than the sum of its proper divisors (78975484).

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

77112644 is a wasteful number, since it uses less digits than its factorization.

77112644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33275 (or 33273 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 77112644 is about 8781.3805292790. The cubic root of 77112644 is about 425.6394415861.

The spelling of 77112644 in words is "seventy-seven million, one hundred twelve thousand, six hundred forty-four".