81474525330 has 64 divisors (see below), whose sum is σ = 214074493056. Its totient is φ = 19681088000.

The previous prime is 81474525323. The next prime is 81474525331. The reversal of 81474525330 is 3352547418.

It is not an unprimeable number, because it can be changed into a prime (81474525331) 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, 346581 + ... + 532040.

It is an arithmetic number, because the mean of its divisors is an integer number (3344913954).

Almost surely, 2^81474525330 is an apocalyptic number.

81474525330 is an abundant number, since it is smaller than the sum of its proper divisors (132599967726).

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

81474525330 is a wasteful number, since it uses less digits than its factorization.

81474525330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878923.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 81474525330 in words is "eighty-one billion, four hundred seventy-four million, five hundred twenty-five thousand, three hundred thirty".