81000332002402 has 16 divisors (see below), whose sum is σ = 130409881825752. Its totient is φ = 37595641605120.

The previous prime is 81000332002379. The next prime is 81000332002427. The reversal of 81000332002402 is 20420023300018.

81000332002402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 78769547798841 + 2230784203561 = 8875221^2 + 1493581^2 .

It is a super-2 number, since 2×81000332002402² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16317550299 + ... + 16317555262.

Almost surely, 2^{81000332002402} is an apocalyptic number.

81000332002402 is a deficient number, since it is larger than the sum of its proper divisors (49409549823350).

81000332002402 is a wasteful number, since it uses less digits than its factorization.

81000332002402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32635105653.

The product of its (nonzero) digits is 2304, while the sum is 25.

The spelling of 81000332002402 in words is "eighty-one trillion, three hundred thirty-two million, two thousand, four hundred two".