695622721601 has 2 divisors, whose sum is σ = 695622721602. Its totient is φ = 695622721600.

The previous prime is 695622721559. The next prime is 695622721609. The reversal of 695622721601 is 106127226596.

It is a Cunningham number, because it is equal to 834040²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695622721600 + 1 = 834040^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 695622721601 - 2²² = 695618527297 is a prime.

It is not a weakly prime, because it can be changed into another prime (695622721609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347811360800 + 347811360801.

It is an arithmetic number, because the mean of its divisors is an integer number (347811360801).

Almost surely, 2^695622721601 is an apocalyptic number.

It is an amenable number.

695622721601 is a deficient number, since it is larger than the sum of its proper divisors (1).

695622721601 is an equidigital number, since it uses as much as digits as its factorization.

695622721601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 695622721601 in words is "six hundred ninety-five billion, six hundred twenty-two million, seven hundred twenty-one thousand, six hundred one".