81374073814 has 8 divisors (see below), whose sum is σ = 133157575368. Its totient is φ = 36988215360.

The previous prime is 81374073773. The next prime is 81374073857. The reversal of 81374073814 is 41837047318.

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

It is a super-3 number, since 3×81374073814³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849410747 + ... + 1849410790.

It is an arithmetic number, because the mean of its divisors is an integer number (16644696921).

Almost surely, 2^81374073814 is an apocalyptic number.

81374073814 is a deficient number, since it is larger than the sum of its proper divisors (51783501554).

81374073814 is a wasteful number, since it uses less digits than its factorization.

81374073814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698821550.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 81374073814 in words is "eighty-one billion, three hundred seventy-four million, seventy-three thousand, eight hundred fourteen".