77323972672 has 56 divisors (see below), whose sum is σ = 157422189600. Its totient is φ = 37670148096.

The previous prime is 77323972667. The next prime is 77323972699. The reversal of 77323972672 is 27627932377.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336079 + ... + 517297.

Almost surely, 2^77323972672 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 77323972672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78711094800).

77323972672 is an abundant number, since it is smaller than the sum of its proper divisors (80098216928).

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

77323972672 is a wasteful number, since it uses less digits than its factorization.

77323972672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181403 (or 181393 counting only the distinct ones).

The product of its digits is 9335088, while the sum is 55.

The spelling of 77323972672 in words is "seventy-seven billion, three hundred twenty-three million, nine hundred seventy-two thousand, six hundred seventy-two".