980943661477 has 16 divisors (see below), whose sum is σ = 1069365190320. Its totient is φ = 894395031552.

The previous prime is 980943661469. The next prime is 980943661483. The reversal of 980943661477 is 774166349089.

It is a Cunningham number, because it is equal to 990426²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 37560765636 + 943382895841 = 193806^2 + 971279^2 .

It is a cyclic number.

It is not a de Polignac number, because 980943661477 - 2³ = 980943661469 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 (980943661417) 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 15 ways as a sum of consecutive naturals, for example, 696493 + ... + 1564285.

It is an arithmetic number, because the mean of its divisors is an integer number (66835324395).

Almost surely, 2^980943661477 is an apocalyptic number.

It is an amenable number.

980943661477 is a deficient number, since it is larger than the sum of its proper divisors (88421528843).

980943661477 is a wasteful number, since it uses less digits than its factorization.

980943661477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868872.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 980943661477 in words is "nine hundred eighty billion, nine hundred forty-three million, six hundred sixty-one thousand, four hundred seventy-seven".