81783541300 has 72 divisors (see below), whose sum is σ = 180307487360. Its totient is φ = 32193158400.

The previous prime is 81783541291. The next prime is 81783541319. The reversal of 81783541300 is 314538718.

It is a super-3 number, since 3×81783541300³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2408440 + ... + 2442160.

Almost surely, 2^81783541300 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 81783541300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90153743680).

81783541300 is an abundant number, since it is smaller than the sum of its proper divisors (98523946060).

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

81783541300 is a wasteful number, since it uses less digits than its factorization.

81783541300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34121 (or 34114 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 81783541300 in words is "eighty-one billion, seven hundred eighty-three million, five hundred forty-one thousand, three hundred".