245342440615663 has 4 divisors (see below), whose sum is σ = 245344661481960. Its totient is φ = 245340219749368.

The previous prime is 245342440615639. The next prime is 245342440615739. The reversal of 245342440615663 is 366516044243542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245342440615663 - 2¹⁷ = 245342440484591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245342440619663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110267433 + ... + 1110488386.

It is an arithmetic number, because the mean of its divisors is an integer number (61336165370490).

Almost surely, 2^{245342440615663} is an apocalyptic number.

245342440615663 is a deficient number, since it is larger than the sum of its proper divisors (2220866297).

245342440615663 is a wasteful number, since it uses less digits than its factorization.

245342440615663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220866296.

The product of its (nonzero) digits is 49766400, while the sum is 55.

The spelling of 245342440615663 in words is "two hundred forty-five trillion, three hundred forty-two billion, four hundred forty million, six hundred fifteen thousand, six hundred sixty-three".