77447674440 has 96 divisors (see below), whose sum is σ = 251934433920. Its totient is φ = 20633883264.

The previous prime is 77447674417. The next prime is 77447674453. The reversal of 77447674440 is 4447674477.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299559 + ... + 494601.

It is an arithmetic number, because the mean of its divisors is an integer number (2624317020).

Almost surely, 2^77447674440 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 77447674440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125967216960).

77447674440 is an abundant number, since it is smaller than the sum of its proper divisors (174486759480).

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

77447674440 is a wasteful number, since it uses less digits than its factorization.

77447674440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196163 (or 196156 counting only the distinct ones).

The product of its (nonzero) digits is 14751744, while the sum is 54.

The spelling of 77447674440 in words is "seventy-seven billion, four hundred forty-seven million, six hundred seventy-four thousand, four hundred forty".