81303459492 has 12 divisors (see below), whose sum is σ = 189708072176. Its totient is φ = 27101153160.

The previous prime is 81303459491. The next prime is 81303459511. The reversal of 81303459492 is 29495430318.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×81303459492² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81303459491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387644134 + ... + 3387644157.

Almost surely, 2^81303459492 is an apocalyptic number.

It is an amenable number.

81303459492 is an abundant number, since it is smaller than the sum of its proper divisors (108404612684).

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

81303459492 is a wasteful number, since it uses less digits than its factorization.

81303459492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775288298 (or 6775288296 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 81303459492 in words is "eighty-one billion, three hundred three million, four hundred fifty-nine thousand, four hundred ninety-two".