81046510850478 has 32 divisors (see below), whose sum is σ = 171664245098496. Its totient is φ = 25420972675968.

The previous prime is 81046510850471. The next prime is 81046510850483. The reversal of 81046510850478 is 87405801564018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046510850471) 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, 83635726 + ... + 84599217.

It is an arithmetic number, because the mean of its divisors is an integer number (5364507659328).

Almost surely, 2^{81046510850478} is an apocalyptic number.

81046510850478 is an abundant number, since it is smaller than the sum of its proper divisors (90617734248018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81046510850478 is a wasteful number, since it uses less digits than its factorization.

81046510850478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168239688.

The product of its (nonzero) digits is 8601600, while the sum is 57.

The spelling of 81046510850478 in words is "eighty-one trillion, forty-six billion, five hundred ten million, eight hundred fifty thousand, four hundred seventy-eight".