81400850682 has 16 divisors (see below), whose sum is σ = 166772475072. Its totient is φ = 26471821280.

The previous prime is 81400850669. The next prime is 81400850693. The reversal of 81400850682 is 28605800418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165448638 + ... + 165449129.

It is an arithmetic number, because the mean of its divisors is an integer number (10423279692).

Almost surely, 2^81400850682 is an apocalyptic number.

81400850682 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

81400850682 is an abundant number, since it is smaller than the sum of its proper divisors (85371624390).

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

81400850682 is a wasteful number, since it uses less digits than its factorization.

81400850682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330897813.

The product of its (nonzero) digits is 122880, while the sum is 42.

The spelling of 81400850682 in words is "eighty-one billion, four hundred million, eight hundred fifty thousand, six hundred eighty-two".