245342315402549 has 4 divisors (see below), whose sum is σ = 245954141625900. Its totient is φ = 244730489179200.

The previous prime is 245342315402533. The next prime is 245342315402633. The reversal of 245342315402549 is 945204513243542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115950211648324 + 129392103754225 = 10768018^2 + 11375065^2 .

It is a cyclic number.

It is not a de Polignac number, because 245342315402549 - 2⁴ = 245342315402533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245342315402549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245342315407549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305913111074 + ... + 305913111875.

It is an arithmetic number, because the mean of its divisors is an integer number (61488535406475).

Almost surely, 2^{245342315402549} is an apocalyptic number.

It is an amenable number.

245342315402549 is a deficient number, since it is larger than the sum of its proper divisors (611826223351).

245342315402549 is an equidigital number, since it uses as much as digits as its factorization.

245342315402549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611826223350.

The product of its (nonzero) digits is 20736000, while the sum is 53.

The spelling of 245342315402549 in words is "two hundred forty-five trillion, three hundred forty-two billion, three hundred fifteen million, four hundred two thousand, five hundred forty-nine".