679446734525 has 12 divisors (see below), whose sum is σ = 907322716692. Its totient is φ = 501745280640.

The previous prime is 679446734521. The next prime is 679446734537. The reversal of 679446734525 is 525437644976.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 72957791449 + 606488943076 = 270107^2 + 778774^2 .

It is not a de Polignac number, because 679446734525 - 2² = 679446734521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679446734521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1045302344 + ... + 1045302993.

It is an arithmetic number, because the mean of its divisors is an integer number (75610226391).

Almost surely, 2^679446734525 is an apocalyptic number.

679446734525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

679446734525 is a deficient number, since it is larger than the sum of its proper divisors (227875982167).

679446734525 is a wasteful number, since it uses less digits than its factorization.

679446734525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090605360 (or 2090605355 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 62.

The spelling of 679446734525 in words is "six hundred seventy-nine billion, four hundred forty-six million, seven hundred thirty-four thousand, five hundred twenty-five".