697649356801 has 2 divisors, whose sum is σ = 697649356802. Its totient is φ = 697649356800.

The previous prime is 697649356787. The next prime is 697649356841. The reversal of 697649356801 is 108653946796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480735609201 + 216913747600 = 693351^2 + 465740^2 .

It is a cyclic number.

It is not a de Polignac number, because 697649356801 - 2⁹ = 697649356289 is a prime.

It is not a weakly prime, because it can be changed into another prime (697649356841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348824678400 + 348824678401.

It is an arithmetic number, because the mean of its divisors is an integer number (348824678401).

Almost surely, 2^697649356801 is an apocalyptic number.

It is an amenable number.

697649356801 is a deficient number, since it is larger than the sum of its proper divisors (1).

697649356801 is an equidigital number, since it uses as much as digits as its factorization.

697649356801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 697649356801 in words is "six hundred ninety-seven billion, six hundred forty-nine million, three hundred fifty-six thousand, eight hundred one".