81006200002 has 16 divisors (see below), whose sum is σ = 149549908032. Its totient is φ = 32046408720.

The previous prime is 81006199999. The next prime is 81006200017. The reversal of 81006200002 is 20000260018.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222544324 + ... + 222544687.

It is an arithmetic number, because the mean of its divisors is an integer number (9346869252).

Almost surely, 2^81006200002 is an apocalyptic number.

81006200002 is a deficient number, since it is larger than the sum of its proper divisors (68543708030).

81006200002 is a wasteful number, since it uses less digits than its factorization.

81006200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445089033.

The product of its (nonzero) digits is 192, while the sum is 19.

The spelling of 81006200002 in words is "eighty-one billion, six million, two hundred thousand, two".