672557518013 has 4 divisors (see below), whose sum is σ = 672597141468. Its totient is φ = 672517894560.

The previous prime is 672557518001. The next prime is 672557518021. The reversal of 672557518013 is 310815755276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 668270280484 + 4287237529 = 817478^2 + 65477^2 .

It is a cyclic number.

It is not a de Polignac number, because 672557518013 - 2⁶ = 672557517949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672557518613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19786256 + ... + 19820217.

It is an arithmetic number, because the mean of its divisors is an integer number (168149285367).

Almost surely, 2^672557518013 is an apocalyptic number.

It is an amenable number.

672557518013 is a deficient number, since it is larger than the sum of its proper divisors (39623455).

672557518013 is a wasteful number, since it uses less digits than its factorization.

672557518013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39623454.

The product of its (nonzero) digits is 1764000, while the sum is 50.

The spelling of 672557518013 in words is "six hundred seventy-two billion, five hundred fifty-seven million, five hundred eighteen thousand, thirteen".