1673243296509 has 16 divisors (see below), whose sum is σ = 2249346418688. Its totient is φ = 1106324013312.

The previous prime is 1673243296493. The next prime is 1673243296523. The reversal of 1673243296509 is 9056923423761.

It is not a de Polignac number, because 1673243296509 - 2⁴ = 1673243296493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673243296009) 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 15 ways as a sum of consecutive naturals, for example, 319929 + ... + 1857105.

It is an arithmetic number, because the mean of its divisors is an integer number (140584151168).

Almost surely, 2^{1673243296509} is an apocalyptic number.

It is an amenable number.

1673243296509 is a deficient number, since it is larger than the sum of its proper divisors (576103122179).

1673243296509 is a wasteful number, since it uses less digits than its factorization.

1673243296509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540164.

The product of its (nonzero) digits is 14696640, while the sum is 57.

The spelling of 1673243296509 in words is "one trillion, six hundred seventy-three billion, two hundred forty-three million, two hundred ninety-six thousand, five hundred nine".