81404310469 has 8 divisors (see below), whose sum is σ = 84038389760. Its totient is φ = 78770739600.

The previous prime is 81404310451. The next prime is 81404310497. The reversal of 81404310469 is 96401340418.

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

It is not a de Polignac number, because 81404310469 - 2⁵ = 81404310437 is a prime.

It is a super-2 number, since 2×81404310469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81404310499) 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, 212764 + ... + 456154.

It is an arithmetic number, because the mean of its divisors is an integer number (10504798720).

Almost surely, 2^81404310469 is an apocalyptic number.

It is an amenable number.

81404310469 is a deficient number, since it is larger than the sum of its proper divisors (2634079291).

81404310469 is a wasteful number, since it uses less digits than its factorization.

81404310469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254211.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 81404310469 in words is "eighty-one billion, four hundred four million, three hundred ten thousand, four hundred sixty-nine".