245577347641 has 2 divisors, whose sum is σ = 245577347642. Its totient is φ = 245577347640.

The previous prime is 245577347591. The next prime is 245577347651. The reversal of 245577347641 is 146743775542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193273657641 + 52303690000 = 439629^2 + 228700^2 .

It is a cyclic number.

It is not a de Polignac number, because 245577347641 - 2²¹ = 245575250489 is a prime.

It is not a weakly prime, because it can be changed into another prime (245577347651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122788673820 + 122788673821.

It is an arithmetic number, because the mean of its divisors is an integer number (122788673821).

Almost surely, 2^245577347641 is an apocalyptic number.

It is an amenable number.

245577347641 is a deficient number, since it is larger than the sum of its proper divisors (1).

245577347641 is an equidigital number, since it uses as much as digits as its factorization.

245577347641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19756800, while the sum is 55.

The spelling of 245577347641 in words is "two hundred forty-five billion, five hundred seventy-seven million, three hundred forty-seven thousand, six hundred forty-one".