81485950 has 48 divisors (see below), whose sum is σ = 186550560. Its totient is φ = 25787520.

The previous prime is 81485939. The next prime is 81485959. The reversal of 81485950 is 5958418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81485959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4405 + ... + 13504.

It is an arithmetic number, because the mean of its divisors is an integer number (3886470).

Almost surely, 2^81485950 is an apocalyptic number.

81485950 is an abundant number, since it is smaller than the sum of its proper divisors (105064610).

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

81485950 is a wasteful number, since it uses less digits than its factorization.

81485950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17941 (or 17936 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 81485950 is about 9026.9568515641. The cubic root of 81485950 is about 433.5384072075.

The spelling of 81485950 in words is "eighty-one million, four hundred eighty-five thousand, nine hundred fifty".