677644541505 has 12 divisors (see below), whose sum is σ = 1174583872020. Its totient is φ = 361410422112.

The previous prime is 677644541503. The next prime is 677644541531. The reversal of 677644541505 is 505145446776.

677644541505 is a `hidden beast` number, since 6 + 7 + 7 + 6 + 44 + 541 + 50 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 252072276624 + 425572264881 = 502068^2 + 652359^2 .

It is not a de Polignac number, because 677644541505 - 2¹ = 677644541503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (677644541501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7529383750 + ... + 7529383839.

It is an arithmetic number, because the mean of its divisors is an integer number (97881989335).

Almost surely, 2^677644541505 is an apocalyptic number.

It is an amenable number.

677644541505 is a deficient number, since it is larger than the sum of its proper divisors (496939330515).

677644541505 is a wasteful number, since it uses less digits than its factorization.

677644541505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15058767600 (or 15058767597 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 54.

The spelling of 677644541505 in words is "six hundred seventy-seven billion, six hundred forty-four million, five hundred forty-one thousand, five hundred five".