320237583661 has 2 divisors, whose sum is σ = 320237583662. Its totient is φ = 320237583660.

The previous prime is 320237583641. The next prime is 320237583667. The reversal of 320237583661 is 166385732023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316737086436 + 3500497225 = 562794^2 + 59165^2 .

It is a cyclic number.

It is not a de Polignac number, because 320237583661 - 2³³ = 311647649069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320237583667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160118791830 + 160118791831.

It is an arithmetic number, because the mean of its divisors is an integer number (160118791831).

Almost surely, 2^320237583661 is an apocalyptic number.

It is an amenable number.

320237583661 is a deficient number, since it is larger than the sum of its proper divisors (1).

320237583661 is an equidigital number, since it uses as much as digits as its factorization.

320237583661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 320237583661 in words is "three hundred twenty billion, two hundred thirty-seven million, five hundred eighty-three thousand, six hundred sixty-one".