248020561643 has 4 divisors (see below), whose sum is σ = 248082555288. Its totient is φ = 247958568000.

The previous prime is 248020561597. The next prime is 248020561661. The reversal of 248020561643 is 346165020842.

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 248020561643 - 2¹⁴ = 248020545259 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 248020561643.

It is not an unprimeable number, because it can be changed into a prime (248020561543) 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, 30990821 + ... + 30998822.

It is an arithmetic number, because the mean of its divisors is an integer number (62020638822).

Almost surely, 2^248020561643 is an apocalyptic number.

248020561643 is a deficient number, since it is larger than the sum of its proper divisors (61993645).

248020561643 is an equidigital number, since it uses as much as digits as its factorization.

248020561643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61993644.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 248020561643 in words is "two hundred forty-eight billion, twenty million, five hundred sixty-one thousand, six hundred forty-three".