677161531042 has 4 divisors (see below), whose sum is σ = 1015742296566. Its totient is φ = 338580765520.

The previous prime is 677161530977. The next prime is 677161531043. The reversal of 677161531042 is 240135161776.

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

It can be written as a sum of positive squares in only one way, i.e., 598133638881 + 79027892161 = 773391^2 + 281119^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 677161531042.

It is not an unprimeable number, because it can be changed into a prime (677161531043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169290382759 + ... + 169290382762.

Almost surely, 2^677161531042 is an apocalyptic number.

677161531042 is a deficient number, since it is larger than the sum of its proper divisors (338580765524).

677161531042 is a wasteful number, since it uses less digits than its factorization.

677161531042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338580765523.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 677161531042 in words is "six hundred seventy-seven billion, one hundred sixty-one million, five hundred thirty-one thousand, forty-two".