81732731350 has 24 divisors (see below), whose sum is σ = 152588046240. Its totient is φ = 32571551520.

The previous prime is 81732731321. The next prime is 81732731407. The reversal of 81732731350 is 5313723718.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3024942 + ... + 3051841.

It is an arithmetic number, because the mean of its divisors is an integer number (6357835260).

Almost surely, 2^81732731350 is an apocalyptic number.

81732731350 is a deficient number, since it is larger than the sum of its proper divisors (70855314890).

81732731350 is a wasteful number, since it uses less digits than its factorization.

81732731350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077064 (or 6077059 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 81732731350 in words is "eighty-one billion, seven hundred thirty-two million, seven hundred thirty-one thousand, three hundred fifty".