77791444372 has 36 divisors (see below), whose sum is σ = 144684296064. Its totient is φ = 36589951360.

The previous prime is 77791444369. The next prime is 77791444391. The reversal of 77791444372 is 27344419777.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2536047 + ... + 2566537.

It is an arithmetic number, because the mean of its divisors is an integer number (4019008224).

Almost surely, 2^77791444372 is an apocalyptic number.

It is an amenable number.

77791444372 is a deficient number, since it is larger than the sum of its proper divisors (66892851692).

77791444372 is a wasteful number, since it uses less digits than its factorization.

77791444372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32736 (or 32717 counting only the distinct ones).

The product of its digits is 8297856, while the sum is 55.

The spelling of 77791444372 in words is "seventy-seven billion, seven hundred ninety-one million, four hundred forty-four thousand, three hundred seventy-two".