81346681414 has 4 divisors (see below), whose sum is σ = 122020022124. Its totient is φ = 40673340706.

The previous prime is 81346681411. The next prime is 81346681433. The reversal of 81346681414 is 41418664318.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81346681411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20336670352 + ... + 20336670355.

It is an arithmetic number, because the mean of its divisors is an integer number (30505005531).

Almost surely, 2^81346681414 is an apocalyptic number.

81346681414 is a deficient number, since it is larger than the sum of its proper divisors (40673340710).

81346681414 is a wasteful number, since it uses less digits than its factorization.

81346681414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40673340709.

The product of its digits is 442368, while the sum is 46.

The spelling of 81346681414 in words is "eighty-one billion, three hundred forty-six million, six hundred eighty-one thousand, four hundred fourteen".