81416069392 has 160 divisors (see below), whose sum is σ = 189932843520. Its totient is φ = 33055334400.

The previous prime is 81416069363. The next prime is 81416069393. The reversal of 81416069392 is 29396061418.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81416069393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203032392 + ... + 203032792.

It is an arithmetic number, because the mean of its divisors is an integer number (1187080272).

Almost surely, 2^81416069392 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 81416069392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94966421760).

81416069392 is an abundant number, since it is smaller than the sum of its proper divisors (108516774128).

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

81416069392 is a wasteful number, since it uses less digits than its factorization.

81416069392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 81416069392 in words is "eighty-one billion, four hundred sixteen million, sixty-nine thousand, three hundred ninety-two".