81763470360 has 960 divisors, whose sum is σ = 331896882240. Its totient is φ = 17928345600.

The previous prime is 81763470353. The next prime is 81763470379. The reversal of 81763470360 is 6307436718.

81763470360 is a `hidden beast` number, since 8 + 1 + 7 + 634 + 7 + 0 + 3 + 6 + 0 = 666.

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 239 ways as a sum of consecutive naturals, for example, 310887589 + ... + 310887851.

It is an arithmetic number, because the mean of its divisors is an integer number (345725919).

Almost surely, 2^81763470360 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81763470360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165948441120).

81763470360 is an abundant number, since it is smaller than the sum of its proper divisors (250133411880).

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

81763470360 is a wasteful number, since it uses less digits than its factorization.

81763470360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 81763470360 in words is "eighty-one billion, seven hundred sixty-three million, four hundred seventy thousand, three hundred sixty".