676544825197 has 4 divisors (see below), whose sum is σ = 676898483580. Its totient is φ = 676191166816.

The previous prime is 676544825179. The next prime is 676544825219. The reversal of 676544825197 is 791528445676.

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 620283831561 + 56260993636 = 787581^2 + 237194^2 .

It is a cyclic number.

It is not a de Polignac number, because 676544825197 - 2¹⁹ = 676544300909 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 (676544825167) 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, 176826322 + ... + 176830147.

It is an arithmetic number, because the mean of its divisors is an integer number (169224620895).

Almost surely, 2^676544825197 is an apocalyptic number.

It is an amenable number.

676544825197 is a deficient number, since it is larger than the sum of its proper divisors (353658383).

676544825197 is a wasteful number, since it uses less digits than its factorization.

676544825197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353658382.

The product of its digits is 101606400, while the sum is 64.

The spelling of 676544825197 in words is "six hundred seventy-six billion, five hundred forty-four million, eight hundred twenty-five thousand, one hundred ninety-seven".