81002367472994 has 32 divisors (see below), whose sum is σ = 133018098998400. Its totient is φ = 36689074905600.

The previous prime is 81002367472991. The next prime is 81002367473003. The reversal of 81002367472994 is 49927476320018.

It is a super-2 number, since 2×81002367472994² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81002367472991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51835907 + ... + 53375705.

It is an arithmetic number, because the mean of its divisors is an integer number (4156815593700).

Almost surely, 2^{81002367472994} is an apocalyptic number.

81002367472994 is a deficient number, since it is larger than the sum of its proper divisors (52015731525406).

81002367472994 is a wasteful number, since it uses less digits than its factorization.

81002367472994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548266.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 81002367472994 in words is "eighty-one trillion, two billion, three hundred sixty-seven million, four hundred seventy-two thousand, nine hundred ninety-four".