214641617657 has 2 divisors, whose sum is σ = 214641617658. Its totient is φ = 214641617656.

The previous prime is 214641617651. The next prime is 214641617713. The reversal of 214641617657 is 756716146412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182516073961 + 32125543696 = 427219^2 + 179236^2 .

It is a cyclic number.

It is not a de Polignac number, because 214641617657 - 2⁸ = 214641617401 is a prime.

It is not a weakly prime, because it can be changed into another prime (214641617651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107320808828 + 107320808829.

It is an arithmetic number, because the mean of its divisors is an integer number (107320808829).

Almost surely, 2^214641617657 is an apocalyptic number.

It is an amenable number.

214641617657 is a deficient number, since it is larger than the sum of its proper divisors (1).

214641617657 is an equidigital number, since it uses as much as digits as its factorization.

214641617657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The spelling of 214641617657 in words is "two hundred fourteen billion, six hundred forty-one million, six hundred seventeen thousand, six hundred fifty-seven".