81634726030 has 32 divisors (see below), whose sum is σ = 172631759328. Its totient is φ = 27401865600.

The previous prime is 81634726021. The next prime is 81634726067. The reversal of 81634726030 is 3062743618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28542181 + ... + 28545040.

It is an arithmetic number, because the mean of its divisors is an integer number (5394742479).

Almost surely, 2^81634726030 is an apocalyptic number.

81634726030 is an abundant number, since it is smaller than the sum of its proper divisors (90997033298).

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

81634726030 is a wasteful number, since it uses less digits than its factorization.

81634726030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57087252.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 81634726030 in words is "eighty-one billion, six hundred thirty-four million, seven hundred twenty-six thousand, thirty".