81744296652 has 36 divisors (see below), whose sum is σ = 209120959320. Its totient is φ = 26919807552.

The previous prime is 81744296639. The next prime is 81744296671. The reversal of 81744296652 is 25669244718.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13675777 + ... + 13681752.

Almost surely, 2^81744296652 is an apocalyptic number.

It is an amenable number.

81744296652 is an abundant number, since it is smaller than the sum of its proper divisors (127376662668).

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

81744296652 is a wasteful number, since it uses less digits than its factorization.

81744296652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27357622 (or 27357617 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 81744296652 in words is "eighty-one billion, seven hundred forty-four million, two hundred ninety-six thousand, six hundred fifty-two".