81234700426 has 8 divisors (see below), whose sum is σ = 132929509824. Its totient is φ = 36924863820.

The previous prime is 81234700409. The next prime is 81234700433. The reversal of 81234700426 is 62400743218.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846243170 + ... + 1846243213.

It is an arithmetic number, because the mean of its divisors is an integer number (16616188728).

Almost surely, 2^81234700426 is an apocalyptic number.

81234700426 is a deficient number, since it is larger than the sum of its proper divisors (51694809398).

81234700426 is a wasteful number, since it uses less digits than its factorization.

81234700426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692486396.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 81234700426 in words is "eighty-one billion, two hundred thirty-four million, seven hundred thousand, four hundred twenty-six".