980143805657 has 2 divisors, whose sum is σ = 980143805658. Its totient is φ = 980143805656.

The previous prime is 980143805623. The next prime is 980143805671. The reversal of 980143805657 is 756508341089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978920275216 + 1223530441 = 989404^2 + 34979^2 .

It is a cyclic number.

It is not a de Polignac number, because 980143805657 - 2⁸ = 980143805401 is a prime.

It is not a weakly prime, because it can be changed into another prime (980143805617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490071902828 + 490071902829.

It is an arithmetic number, because the mean of its divisors is an integer number (490071902829).

Almost surely, 2^980143805657 is an apocalyptic number.

It is an amenable number.

980143805657 is a deficient number, since it is larger than the sum of its proper divisors (1).

980143805657 is an equidigital number, since it uses as much as digits as its factorization.

980143805657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 980143805657 in words is "nine hundred eighty billion, one hundred forty-three million, eight hundred five thousand, six hundred fifty-seven".