81064416002 has 8 divisors (see below), whose sum is σ = 121922621436. Its totient is φ = 40423542192.

The previous prime is 81064416001. The next prime is 81064416029. The reversal of 81064416002 is 20061446018.

It can be written as a sum of positive squares in 2 ways, for example, as 80213001961 + 851414041 = 283219^2 + 29179^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 81064416002.

It is not an unprimeable number, because it can be changed into a prime (81064416001) 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, 54331973 + ... + 54333464.

Almost surely, 2^81064416002 is an apocalyptic number.

81064416002 is a deficient number, since it is larger than the sum of its proper divisors (40858205434).

81064416002 is a wasteful number, since it uses less digits than its factorization.

81064416002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108665812.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 81064416002 in words is "eighty-one billion, sixty-four million, four hundred sixteen thousand, two".