81104667441 has 16 divisors (see below), whose sum is σ = 123614661504. Its totient is φ = 46335550464.

The previous prime is 81104667439. The next prime is 81104667463. The reversal of 81104667441 is 14476640118.

It is a happy number.

It is not a de Polignac number, because 81104667441 - 2¹ = 81104667439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81104667393 and 81104667402.

It is not an unprimeable number, because it can be changed into a prime (81104667041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315106 + ... + 511371.

It is an arithmetic number, because the mean of its divisors is an integer number (7725916344).

Almost surely, 2^81104667441 is an apocalyptic number.

It is an amenable number.

81104667441 is a deficient number, since it is larger than the sum of its proper divisors (42509994063).

81104667441 is a wasteful number, since it uses less digits than its factorization.

81104667441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831160.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 81104667441 in words is "eighty-one billion, one hundred four million, six hundred sixty-seven thousand, four hundred forty-one".