81724290703 has 8 divisors (see below), whose sum is σ = 91328254416. Its totient is φ = 72482740800.

The previous prime is 81724290701. The next prime is 81724290727. The reversal of 81724290703 is 30709242718.

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

It is a cyclic number.

It is not a de Polignac number, because 81724290703 - 2¹ = 81724290701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81724290703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81724290701) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 90602976 + ... + 90603877.

It is an arithmetic number, because the mean of its divisors is an integer number (11416031802).

Almost surely, 2^81724290703 is an apocalyptic number.

81724290703 is a deficient number, since it is larger than the sum of its proper divisors (9603963713).

81724290703 is a wasteful number, since it uses less digits than its factorization.

81724290703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181206905.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 81724290703 in words is "eighty-one billion, seven hundred twenty-four million, two hundred ninety thousand, seven hundred three".