2420646545 has 4 divisors (see below), whose sum is σ = 2904775860. Its totient is φ = 1936517232.

The previous prime is 2420646539. The next prime is 2420646629. The reversal of 2420646545 is 5456460242.

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 460016704 + 1960629841 = 21448^2 + 44279^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420646545 - 2¹⁴ = 2420630161 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2420646499 and 2420646508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242064650 + ... + 242064659.

It is an arithmetic number, because the mean of its divisors is an integer number (726193965).

Almost surely, 2^2420646545 is an apocalyptic number.

It is an amenable number.

2420646545 is a deficient number, since it is larger than the sum of its proper divisors (484129315).

2420646545 is an equidigital number, since it uses as much as digits as its factorization.

2420646545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484129314.

The product of its (nonzero) digits is 230400, while the sum is 38.

The square root of 2420646545 is about 49200.0665141827. The cubic root of 2420646545 is about 1342.6942423140.

The spelling of 2420646545 in words is "two billion, four hundred twenty million, six hundred forty-six thousand, five hundred forty-five".