81341474012 has 12 divisors (see below), whose sum is σ = 142354160256. Its totient is φ = 40668856800.

The previous prime is 81341474003. The next prime is 81341474033. The reversal of 81341474012 is 21047414318.

It is a super-2 number, since 2×81341474012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 370364 + ... + 547587.

It is an arithmetic number, because the mean of its divisors is an integer number (11862846688).

Almost surely, 2^81341474012 is an apocalyptic number.

It is an amenable number.

81341474012 is a deficient number, since it is larger than the sum of its proper divisors (61012686244).

81341474012 is a wasteful number, since it uses less digits than its factorization.

81341474012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940108 (or 940106 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 81341474012 in words is "eighty-one billion, three hundred forty-one million, four hundred seventy-four thousand, twelve".