3449621208857 has 2 divisors, whose sum is σ = 3449621208858. Its totient is φ = 3449621208856.

The previous prime is 3449621208811. The next prime is 3449621208889. The reversal of 3449621208857 is 7588021269443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3353399650441 + 96221558416 = 1831229^2 + 310196^2 .

It is a cyclic number.

It is not a de Polignac number, because 3449621208857 - 2²⁸ = 3449352773401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3449621208796 and 3449621208805.

It is not a weakly prime, because it can be changed into another prime (3449621208457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1724810604428 + 1724810604429.

It is an arithmetic number, because the mean of its divisors is an integer number (1724810604429).

It is a 1-persistent number, because it is pandigital, but 2⋅3449621208857 = 6899242417714 is not.

Almost surely, 2^{3449621208857} is an apocalyptic number.

It is an amenable number.

3449621208857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3449621208857 is an equidigital number, since it uses as much as digits as its factorization.

3449621208857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 3449621208857 in words is "three trillion, four hundred forty-nine billion, six hundred twenty-one million, two hundred eight thousand, eight hundred fifty-seven".