245261687256337 has 2 divisors, whose sum is σ = 245261687256338. Its totient is φ = 245261687256336.

The previous prime is 245261687256247. The next prime is 245261687256449. The reversal of 245261687256337 is 733652786162542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242037953189761 + 3223734066576 = 15557569^2 + 1795476^2 .

It is a cyclic number.

It is not a de Polignac number, because 245261687256337 - 2¹⁵ = 245261687223569 is a prime.

It is not a weakly prime, because it can be changed into another prime (245261687250337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122630843628168 + 122630843628169.

It is an arithmetic number, because the mean of its divisors is an integer number (122630843628169).

Almost surely, 2^{245261687256337} is an apocalyptic number.

It is an amenable number.

245261687256337 is a deficient number, since it is larger than the sum of its proper divisors (1).

245261687256337 is an equidigital number, since it uses as much as digits as its factorization.

245261687256337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 609638400, while the sum is 67.

The spelling of 245261687256337 in words is "two hundred forty-five trillion, two hundred sixty-one billion, six hundred eighty-seven million, two hundred fifty-six thousand, three hundred thirty-seven".