81741409604 has 12 divisors (see below), whose sum is σ = 151462023804. Its totient is φ = 38466545664.

The previous prime is 81741409583. The next prime is 81741409609. The reversal of 81741409604 is 40690414718.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68514109504 + 13227300100 = 261752^2 + 115010^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (81741409609) 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, 601039709 + ... + 601039844.

It is an arithmetic number, because the mean of its divisors is an integer number (12621835317).

Almost surely, 2^81741409604 is an apocalyptic number.

It is an amenable number.

81741409604 is a deficient number, since it is larger than the sum of its proper divisors (69720614200).

81741409604 is a wasteful number, since it uses less digits than its factorization.

81741409604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202079574 (or 1202079572 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 81741409604 in words is "eighty-one billion, seven hundred forty-one million, four hundred nine thousand, six hundred four".