81410774337 has 12 divisors (see below), whose sum is σ = 118050905700. Its totient is φ = 54062665728.

The previous prime is 81410774329. The next prime is 81410774339. The reversal of 81410774337 is 73347701418.

It is a happy number.

81410774337 is a `hidden beast` number, since 8 + 141 + 0 + 77 + 433 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63280421136 + 18130353201 = 251556^2 + 134649^2 .

It is not a de Polignac number, because 81410774337 - 2³ = 81410774329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81410774292 and 81410774301.

It is not an unprimeable number, because it can be changed into a prime (81410774339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17596212 + ... + 17600837.

It is an arithmetic number, because the mean of its divisors is an integer number (9837575475).

Almost surely, 2^81410774337 is an apocalyptic number.

It is an amenable number.

81410774337 is a deficient number, since it is larger than the sum of its proper divisors (36640131363).

81410774337 is a wasteful number, since it uses less digits than its factorization.

81410774337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35197312 (or 35197309 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 81410774337 in words is "eighty-one billion, four hundred ten million, seven hundred seventy-four thousand, three hundred thirty-seven".