688056160409 has 2 divisors, whose sum is σ = 688056160410. Its totient is φ = 688056160408.

The previous prime is 688056160387. The next prime is 688056160457. The reversal of 688056160409 is 904061650886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571483081225 + 116573079184 = 755965^2 + 341428^2 .

It is a cyclic number.

It is not a de Polignac number, because 688056160409 - 2¹² = 688056156313 is a prime.

It is not a weakly prime, because it can be changed into another prime (688056160609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344028080204 + 344028080205.

It is an arithmetic number, because the mean of its divisors is an integer number (344028080205).

Almost surely, 2^688056160409 is an apocalyptic number.

It is an amenable number.

688056160409 is a deficient number, since it is larger than the sum of its proper divisors (1).

688056160409 is an equidigital number, since it uses as much as digits as its factorization.

688056160409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 688056160409 in words is "six hundred eighty-eight billion, fifty-six million, one hundred sixty thousand, four hundred nine".