81045021362 has 8 divisors (see below), whose sum is σ = 121568914800. Its totient is φ = 40522049764.

The previous prime is 81045021353. The next prime is 81045021367. The reversal of 81045021362 is 26312054018.

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

It is not an unprimeable number, because it can be changed into a prime (81045021367) by changing a digit.

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, 65189 + ... + 407847.

It is an arithmetic number, because the mean of its divisors is an integer number (15196114350).

Almost surely, 2^81045021362 is an apocalyptic number.

81045021362 is a deficient number, since it is larger than the sum of its proper divisors (40523893438).

81045021362 is a wasteful number, since it uses less digits than its factorization.

81045021362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460920.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 81045021362 in words is "eighty-one billion, forty-five million, twenty-one thousand, three hundred sixty-two".