81153831360 has 336 divisors, whose sum is σ = 303849670176. Its totient is φ = 18294571008.

The previous prime is 81153831331. The next prime is 81153831371. The reversal of 81153831360 is 6313835118.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3422104 + ... + 3445736.

Almost surely, 2^81153831360 is an apocalyptic number.

81153831360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81153831360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151924835088).

81153831360 is an abundant number, since it is smaller than the sum of its proper divisors (222695838816).

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

81153831360 is a wasteful number, since it uses less digits than its factorization.

81153831360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23740 (or 23723 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 81153831360 in words is "eighty-one billion, one hundred fifty-three million, eight hundred thirty-one thousand, three hundred sixty".