1997609418903 has 64 divisors (see below), whose sum is σ = 3312279060480. Its totient is φ = 1045030896000.

The previous prime is 1997609418901. The next prime is 1997609418949. The reversal of 1997609418903 is 3098149067991.

It is not a de Polignac number, because 1997609418903 - 2¹ = 1997609418901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997609418901) 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 63 ways as a sum of consecutive naturals, for example, 8555476 + ... + 8785862.

It is an arithmetic number, because the mean of its divisors is an integer number (51754360320).

Almost surely, 2^{1997609418903} is an apocalyptic number.

1997609418903 is a deficient number, since it is larger than the sum of its proper divisors (1314669641577).

1997609418903 is a wasteful number, since it uses less digits than its factorization.

1997609418903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231148.

The product of its (nonzero) digits is 26453952, while the sum is 66.

The spelling of 1997609418903 in words is "one trillion, nine hundred ninety-seven billion, six hundred nine million, four hundred eighteen thousand, nine hundred three".