672499647549 has 24 divisors (see below), whose sum is σ = 1045961579520. Its totient is φ = 414808683648.

The previous prime is 672499647517. The next prime is 672499647557. The reversal of 672499647549 is 945746994276.

It is a happy number.

672499647549 is a `hidden beast` number, since 6 + 7 + 2 + 499 + 64 + 75 + 4 + 9 = 666.

It is not a de Polignac number, because 672499647549 - 2⁵ = 672499647517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672499647649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37240317 + ... + 37258370.

It is an arithmetic number, because the mean of its divisors is an integer number (43581732480).

Almost surely, 2^672499647549 is an apocalyptic number.

It is an amenable number.

672499647549 is a deficient number, since it is larger than the sum of its proper divisors (373461931971).

672499647549 is a wasteful number, since it uses less digits than its factorization.

672499647549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74498769 (or 74498766 counting only the distinct ones).

The product of its digits is 823011840, while the sum is 72.

The spelling of 672499647549 in words is "six hundred seventy-two billion, four hundred ninety-nine million, six hundred forty-seven thousand, five hundred forty-nine".