81754284700 has 72 divisors (see below), whose sum is σ = 193995489744. Its totient is φ = 29658048000.

The previous prime is 81754284697. The next prime is 81754284701. The reversal of 81754284700 is 748245718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81754284701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374832 + ... + 551368.

It is an arithmetic number, because the mean of its divisors is an integer number (2694381802).

Almost surely, 2^81754284700 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 81754284700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96997744872).

81754284700 is an abundant number, since it is smaller than the sum of its proper divisors (112241205044).

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

81754284700 is a wasteful number, since it uses less digits than its factorization.

81754284700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176983 (or 176976 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 46.

The spelling of 81754284700 in words is "eighty-one billion, seven hundred fifty-four million, two hundred eighty-four thousand, seven hundred".