81410664142 has 8 divisors (see below), whose sum is σ = 122120426736. Its totient is φ = 40703855232.

The previous prime is 81410664133. The next prime is 81410664163. The reversal of 81410664142 is 24146601418.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668178 + ... + 780565.

It is an arithmetic number, because the mean of its divisors is an integer number (15265053342).

Almost surely, 2^81410664142 is an apocalyptic number.

81410664142 is a deficient number, since it is larger than the sum of its proper divisors (40709762594).

81410664142 is a wasteful number, since it uses less digits than its factorization.

81410664142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476842.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 81410664142 in words is "eighty-one billion, four hundred ten million, six hundred sixty-four thousand, one hundred forty-two".