655691946079 has 2 divisors, whose sum is σ = 655691946080. Its totient is φ = 655691946078.

The previous prime is 655691946023. The next prime is 655691946089. The reversal of 655691946079 is 970649196556.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655691946079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655691946089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327845973039 + 327845973040.

It is an arithmetic number, because the mean of its divisors is an integer number (327845973040).

Almost surely, 2^655691946079 is an apocalyptic number.

655691946079 is a deficient number, since it is larger than the sum of its proper divisors (1).

655691946079 is an equidigital number, since it uses as much as digits as its factorization.

655691946079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110224800, while the sum is 67.

The spelling of 655691946079 in words is "six hundred fifty-five billion, six hundred ninety-one million, nine hundred forty-six thousand, seventy-nine".