697609699999957 has 2 divisors, whose sum is σ = 697609699999958. Its totient is φ = 697609699999956.

The previous prime is 697609699999939. The next prime is 697609699999999. The reversal of 697609699999957 is 759999996906796.

697609699999957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662326563318436 + 35283136681521 = 25735706^2 + 5939961^2 .

It is a cyclic number.

It is not a de Polignac number, because 697609699999957 - 2¹⁹ = 697609699475669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697609699999907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348804849999978 + 348804849999979.

It is an arithmetic number, because the mean of its divisors is an integer number (348804849999979).

Almost surely, 2^{697609699999957} is an apocalyptic number.

It is an amenable number.

697609699999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

697609699999957 is an equidigital number, since it uses as much as digits as its factorization.

697609699999957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2278032475320, while the sum is 109.

The spelling of 697609699999957 in words is "six hundred ninety-seven trillion, six hundred nine billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-seven".