81580119467 has 32 divisors (see below), whose sum is σ = 105954816000. Its totient is φ = 60953731200.

The previous prime is 81580119449. The next prime is 81580119479. The reversal of 81580119467 is 76491108518.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81580119467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81580119437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103409 + ... + 416957.

It is an arithmetic number, because the mean of its divisors is an integer number (3311088000).

Almost surely, 2^81580119467 is an apocalyptic number.

81580119467 is a deficient number, since it is larger than the sum of its proper divisors (24374696533).

81580119467 is a wasteful number, since it uses less digits than its factorization.

81580119467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313707.

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 81580119467 in words is "eighty-one billion, five hundred eighty million, one hundred nineteen thousand, four hundred sixty-seven".