677389453865 has 4 divisors (see below), whose sum is σ = 812867344644. Its totient is φ = 541911563088.

The previous prime is 677389453801. The next prime is 677389453883. The reversal of 677389453865 is 568354983776.

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 103084660624 + 574304793241 = 321068^2 + 757829^2 .

It is a cyclic number.

It is not a de Polignac number, because 677389453865 - 2⁶ = 677389453801 is a prime.

It is a super-3 number, since 3×677389453865³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67738945382 + ... + 67738945391.

It is an arithmetic number, because the mean of its divisors is an integer number (203216836161).

Almost surely, 2^677389453865 is an apocalyptic number.

It is an amenable number.

677389453865 is a deficient number, since it is larger than the sum of its proper divisors (135477890779).

677389453865 is a wasteful number, since it uses less digits than its factorization.

677389453865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135477890778.

The product of its digits is 914457600, while the sum is 71.

The spelling of 677389453865 in words is "six hundred seventy-seven billion, three hundred eighty-nine million, four hundred fifty-three thousand, eight hundred sixty-five".