81180076609 has 8 divisors (see below), whose sum is σ = 85558356000. Its totient is φ = 76812361632.

The previous prime is 81180076577. The next prime is 81180076613. The reversal of 81180076609 is 90667008118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81180076609 - 2⁵ = 81180076577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81180076709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2625319 + ... + 2656060.

It is an arithmetic number, because the mean of its divisors is an integer number (10694794500).

Almost surely, 2^81180076609 is an apocalyptic number.

It is an amenable number.

81180076609 is a deficient number, since it is larger than the sum of its proper divisors (4378279391).

81180076609 is a wasteful number, since it uses less digits than its factorization.

81180076609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282207.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 81180076609 in words is "eighty-one billion, one hundred eighty million, seventy-six thousand, six hundred nine".