81648801360 has 160 divisors (see below), whose sum is σ = 321411214080. Its totient is φ = 18662579712.

The previous prime is 81648801347. The next prime is 81648801379. The reversal of 81648801360 is 6310884618.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2684907 + ... + 2715146.

It is an arithmetic number, because the mean of its divisors is an integer number (2008820088).

Almost surely, 2^81648801360 is an apocalyptic number.

81648801360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81648801360 is an abundant number, since it is smaller than the sum of its proper divisors (239762412720).

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

81648801360 is a wasteful number, since it uses less digits than its factorization.

81648801360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400082 (or 5400070 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 81648801360 in words is "eighty-one billion, six hundred forty-eight million, eight hundred one thousand, three hundred sixty".