117620441657 has 2 divisors, whose sum is σ = 117620441658. Its totient is φ = 117620441656.

The previous prime is 117620441651. The next prime is 117620441693. The reversal of 117620441657 is 756144026711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117026252281 + 594189376 = 342091^2 + 24376^2 .

It is an emirp because it is prime and its reverse (756144026711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117620441657 - 2³⁶ = 48900964921 is a prime.

It is not a weakly prime, because it can be changed into another prime (117620441651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58810220828 + 58810220829.

It is an arithmetic number, because the mean of its divisors is an integer number (58810220829).

Almost surely, 2^117620441657 is an apocalyptic number.

It is an amenable number.

117620441657 is a deficient number, since it is larger than the sum of its proper divisors (1).

117620441657 is an equidigital number, since it uses as much as digits as its factorization.

117620441657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 117620441657 in words is "one hundred seventeen billion, six hundred twenty million, four hundred forty-one thousand, six hundred fifty-seven".