77443622344 has 64 divisors (see below), whose sum is σ = 164227694400. Its totient is φ = 33913555200.

The previous prime is 77443622341. The next prime is 77443622357. The reversal of 77443622344 is 44322634477.

It is a junction number, because it is equal to n+sod(n) for n = 77443622294 and 77443622303.

It is not an unprimeable number, because it can be changed into a prime (77443622341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1143559 + ... + 1209385.

It is an arithmetic number, because the mean of its divisors is an integer number (2566057725).

Almost surely, 2^77443622344 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 77443622344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82113847200).

77443622344 is an abundant number, since it is smaller than the sum of its proper divisors (86784072056).

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

77443622344 is a wasteful number, since it uses less digits than its factorization.

77443622344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66334 (or 66330 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 46.

The spelling of 77443622344 in words is "seventy-seven billion, four hundred forty-three million, six hundred twenty-two thousand, three hundred forty-four".