81600603 has 8 divisors (see below), whose sum is σ = 124343808. Its totient is φ = 46628904.

The previous prime is 81600581. The next prime is 81600613. The reversal of 81600603 is 30600618.

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

It is not a de Polignac number, because 81600603 - 2¹⁰ = 81599579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81600613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942851 + ... + 1942892.

It is an arithmetic number, because the mean of its divisors is an integer number (15542976).

Almost surely, 2^81600603 is an apocalyptic number.

81600603 is a deficient number, since it is larger than the sum of its proper divisors (42743205).

81600603 is a wasteful number, since it uses less digits than its factorization.

81600603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885753.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 81600603 is about 9033.3052090583. The cubic root of 81600603 is about 433.7416454525.

The spelling of 81600603 in words is "eighty-one million, six hundred thousand, six hundred three".