673545116555520 has 144 divisors (see below), whose sum is σ = 2346692417600832. Its totient is φ = 163283664609280.

The previous prime is 673545116555431. The next prime is 673545116555611. The reversal of 673545116555520 is 25555611545376.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7972792947 + ... + 7972877426.

It is an arithmetic number, because the mean of its divisors is an integer number (16296475122228).

Almost surely, 2^{673545116555520} is an apocalyptic number.

673545116555520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673545116555520 is an abundant number, since it is smaller than the sum of its proper divisors (1673147301045312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673545116555520 is a wasteful number, since it uses less digits than its factorization.

673545116555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15945670408 (or 15945670394 counting only the distinct ones).

The product of its (nonzero) digits is 94500000, while the sum is 60.

The spelling of 673545116555520 in words is "six hundred seventy-three trillion, five hundred forty-five billion, one hundred sixteen million, five hundred fifty-five thousand, five hundred twenty".