672815512985 has 96 divisors (see below), whose sum is σ = 1049500488960. Its totient is φ = 405050849280.

The previous prime is 672815512979. The next prime is 672815513003. The reversal of 672815512985 is 589215518276.

It is a happy number.

It is not a de Polignac number, because 672815512985 - 2¹⁰ = 672815511961 is a prime.

It is a super-2 number, since 2×672815512985² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16186589 + ... + 16228101.

It is an arithmetic number, because the mean of its divisors is an integer number (10932296760).

Almost surely, 2^672815512985 is an apocalyptic number.

It is an amenable number.

672815512985 is a deficient number, since it is larger than the sum of its proper divisors (376684975975).

672815512985 is a wasteful number, since it uses less digits than its factorization.

672815512985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41679 (or 41668 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 59.

The spelling of 672815512985 in words is "six hundred seventy-two billion, eight hundred fifteen million, five hundred twelve thousand, nine hundred eighty-five".