245554501399657 has 2 divisors, whose sum is σ = 245554501399658. Its totient is φ = 245554501399656.

The previous prime is 245554501399621. The next prime is 245554501399847. The reversal of 245554501399657 is 756993105455542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209990703995136 + 35563797404521 = 14491056^2 + 5963539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245554501399657 is a prime.

It is not a weakly prime, because it can be changed into another prime (245554501396657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122777250699828 + 122777250699829.

It is an arithmetic number, because the mean of its divisors is an integer number (122777250699829).

Almost surely, 2^{245554501399657} is an apocalyptic number.

It is an amenable number.

245554501399657 is a deficient number, since it is larger than the sum of its proper divisors (1).

245554501399657 is an equidigital number, since it uses as much as digits as its factorization.

245554501399657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600000, while the sum is 70.

The spelling of 245554501399657 in words is "two hundred forty-five trillion, five hundred fifty-four billion, five hundred one million, three hundred ninety-nine thousand, six hundred fifty-seven".