81833762700 has 144 divisors (see below), whose sum is σ = 263524800000. Its totient is φ = 21785474880.

The previous prime is 81833762687. The next prime is 81833762701. The reversal of 81833762700 is 726733818.

81833762700 is a `hidden beast` number, since 8 + 1 + 8 + 3 + 376 + 270 + 0 = 666.

It is a super-2 number, since 2×81833762700² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (81833762701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1592001 + ... + 1642599.

Almost surely, 2^81833762700 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 81833762700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131762400000).

81833762700 is an abundant number, since it is smaller than the sum of its proper divisors (181691037300).

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

81833762700 is a wasteful number, since it uses less digits than its factorization.

81833762700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51221 (or 51208 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 81833762700 in words is "eighty-one billion, eight hundred thirty-three million, seven hundred sixty-two thousand, seven hundred".