81754854192 has 120 divisors (see below), whose sum is σ = 251663447568. Its totient is φ = 24774140160.

The previous prime is 81754854131. The next prime is 81754854193. The reversal of 81754854192 is 29145845718.

81754854192 is a `hidden beast` number, since 8 + 1 + 7 + 5 + 4 + 8 + 541 + 92 = 666.

It is not an unprimeable number, because it can be changed into a prime (81754854193) 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, 21613 + ... + 404940.

Almost surely, 2^81754854192 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 81754854192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125831723784).

81754854192 is an abundant number, since it is smaller than the sum of its proper divisors (169908593376).

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

81754854192 is a wasteful number, since it uses less digits than its factorization.

81754854192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426600 (or 426569 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 81754854192 in words is "eighty-one billion, seven hundred fifty-four million, eight hundred fifty-four thousand, one hundred ninety-two".