81298945224 has 96 divisors (see below), whose sum is σ = 256993701120. Its totient is φ = 22734044928.

The previous prime is 81298945201. The next prime is 81298945229. The reversal of 81298945224 is 42254989218.

81298945224 is a `hidden beast` number, since 8 + 1 + 29 + 8 + 94 + 522 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (81298945229) 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, 1692349 + ... + 1739724.

It is an arithmetic number, because the mean of its divisors is an integer number (2677017720).

Almost surely, 2^81298945224 is an apocalyptic number.

81298945224 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

81298945224 is an abundant number, since it is smaller than the sum of its proper divisors (175694755896).

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

81298945224 is a wasteful number, since it uses less digits than its factorization.

81298945224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432139 (or 3432132 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 81298945224 in words is "eighty-one billion, two hundred ninety-eight million, nine hundred forty-five thousand, two hundred twenty-four".