81348452292 has 24 divisors (see below), whose sum is σ = 200978529696. Its totient is φ = 25521083008.

The previous prime is 81348452287. The next prime is 81348452299. The reversal of 81348452292 is 29225484318.

It is not an unprimeable number, because it can be changed into a prime (81348452299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199383258 + ... + 199383665.

It is an arithmetic number, because the mean of its divisors is an integer number (8374105404).

Almost surely, 2^81348452292 is an apocalyptic number.

It is an amenable number.

81348452292 is an abundant number, since it is smaller than the sum of its proper divisors (119630077404).

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

81348452292 is a wasteful number, since it uses less digits than its factorization.

81348452292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398766947 (or 398766945 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The spelling of 81348452292 in words is "eighty-one billion, three hundred forty-eight million, four hundred fifty-two thousand, two hundred ninety-two".