77044000000 has 504 divisors, whose sum is σ = 224198380224. Its totient is φ = 26112000000.

The previous prime is 77043999997. The next prime is 77044000001. The reversal of 77044000000 is 44077.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77044000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 747999949 + ... + 748000051.

It is an arithmetic number, because the mean of its divisors is an integer number (444838056).

Almost surely, 2^77044000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77044000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112099190112).

77044000000 is an abundant number, since it is smaller than the sum of its proper divisors (147154380224).

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

77044000000 is an equidigital number, since it uses as much as digits as its factorization.

77044000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

Adding to 77044000000 its reverse (44077), we get a palindrome (77044044077).

The spelling of 77044000000 in words is "seventy-seven billion, forty-four million", and thus it is an aban number.