81204492480 has 56 divisors (see below), whose sum is σ = 257824266672. Its totient is φ = 21654531072.

The previous prime is 81204492469. The next prime is 81204492511. The reversal of 81204492480 is 8429440218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42293047 + ... + 42294966.

It is an arithmetic number, because the mean of its divisors is an integer number (4604004762).

Almost surely, 2^81204492480 is an apocalyptic number.

81204492480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81204492480 is an abundant number, since it is smaller than the sum of its proper divisors (176619774192).

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

81204492480 is a wasteful number, since it uses less digits than its factorization.

81204492480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84588033 (or 84588023 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 81204492480 in words is "eighty-one billion, two hundred four million, four hundred ninety-two thousand, four hundred eighty".