2545421845 has 16 divisors (see below), whose sum is σ = 3273459840. Its totient is φ = 1895154624.

The previous prime is 2545421821. The next prime is 2545421863. The reversal of 2545421845 is 5481245452.

It is a cyclic number.

It is not a de Polignac number, because 2545421845 - 2¹⁷ = 2545290773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2545421798 and 2545421807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294855 + ... + 303364.

It is an arithmetic number, because the mean of its divisors is an integer number (204591240).

Almost surely, 2^2545421845 is an apocalyptic number.

It is an amenable number.

2545421845 is a deficient number, since it is larger than the sum of its proper divisors (728037995).

2545421845 is a wasteful number, since it uses less digits than its factorization.

2545421845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598284.

The product of its digits is 256000, while the sum is 40.

The square root of 2545421845 is about 50452.1738382005. The cubic root of 2545421845 is about 1365.3791153113.

The spelling of 2545421845 in words is "two billion, five hundred forty-five million, four hundred twenty-one thousand, eight hundred forty-five".