674528548509 has 36 divisors (see below), whose sum is σ = 1009690673940. Its totient is φ = 433931617728.

The previous prime is 674528548483. The next prime is 674528548537. The reversal of 674528548509 is 905845825476.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

674528548509 is a `hidden beast` number, since 6 + 7 + 4 + 5 + 2 + 85 + 48 + 509 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 460502031609 + 214026516900 = 678603^2 + 462630^2 .

It is not a de Polignac number, because 674528548509 - 2⁷ = 674528548381 is a prime.

It is a super-2 number, since 2×674528548509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674528548009) 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 35 ways as a sum of consecutive naturals, for example, 384784377 + ... + 384786129.

It is an arithmetic number, because the mean of its divisors is an integer number (28046963165).

Almost surely, 2^674528548509 is an apocalyptic number.

674528548509 is the 439002-nd nonagonal number.

It is an amenable number.

674528548509 is a deficient number, since it is larger than the sum of its proper divisors (335162125431).

674528548509 is an frugal number, since it uses more digits than its factorization.

674528548509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599 (or 1785 counting only the distinct ones).

The product of its (nonzero) digits is 96768000, while the sum is 63.

The spelling of 674528548509 in words is "six hundred seventy-four billion, five hundred twenty-eight million, five hundred forty-eight thousand, five hundred nine".