81963960148 has 48 divisors (see below), whose sum is σ = 164358230400. Its totient is φ = 35035324416.

The previous prime is 81963960077. The next prime is 81963960161. The reversal of 81963960148 is 84106936918.

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 15 ways as a sum of consecutive naturals, for example, 33910236 + ... + 33912652.

It is an arithmetic number, because the mean of its divisors is an integer number (3424129800).

Almost surely, 2^81963960148 is an apocalyptic number.

It is an amenable number.

81963960148 is an abundant number, since it is smaller than the sum of its proper divisors (82394270252).

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

81963960148 is a wasteful number, since it uses less digits than its factorization.

81963960148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104 (or 5102 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 81963960148 in words is "eighty-one billion, nine hundred sixty-three million, nine hundred sixty thousand, one hundred forty-eight".