81234700427 has 8 divisors (see below), whose sum is σ = 82774541520. Its totient is φ = 79708794880.

The previous prime is 81234700409. The next prime is 81234700433. The reversal of 81234700427 is 72400743218.

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 81234700427 - 2⁶ = 81234700363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81234700457) 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, 3472118 + ... + 3495435.

It is an arithmetic number, because the mean of its divisors is an integer number (10346817690).

Almost surely, 2^81234700427 is an apocalyptic number.

81234700427 is a deficient number, since it is larger than the sum of its proper divisors (1539841093).

81234700427 is a wasteful number, since it uses less digits than its factorization.

81234700427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967773.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 81234700427 in words is "eighty-one billion, two hundred thirty-four million, seven hundred thousand, four hundred twenty-seven".