81074227433 has 4 divisors (see below), whose sum is σ = 81319165008. Its totient is φ = 80829289860.

The previous prime is 81074227391. The next prime is 81074227441. The reversal of 81074227433 is 33472247018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81074227433 - 2¹⁸ = 81073965289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81074227463) 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, 122468291 + ... + 122468952.

It is an arithmetic number, because the mean of its divisors is an integer number (20329791252).

Almost surely, 2^81074227433 is an apocalyptic number.

It is an amenable number.

81074227433 is a deficient number, since it is larger than the sum of its proper divisors (244937575).

81074227433 is a wasteful number, since it uses less digits than its factorization.

81074227433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244937574.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 81074227433 in words is "eighty-one billion, seventy-four million, two hundred twenty-seven thousand, four hundred thirty-three".