81141471467 has 4 divisors (see below), whose sum is σ = 92733110256. Its totient is φ = 69549832680.

The previous prime is 81141471413. The next prime is 81141471469. The reversal of 81141471467 is 76417414118.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81141471467 - 2¹⁶ = 81141405931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81141471469) 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, 5795819384 + ... + 5795819397.

It is an arithmetic number, because the mean of its divisors is an integer number (23183277564).

Almost surely, 2^81141471467 is an apocalyptic number.

81141471467 is a deficient number, since it is larger than the sum of its proper divisors (11591638789).

81141471467 is a wasteful number, since it uses less digits than its factorization.

81141471467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591638788.

The product of its digits is 150528, while the sum is 44.

The spelling of 81141471467 in words is "eighty-one billion, one hundred forty-one million, four hundred seventy-one thousand, four hundred sixty-seven".