2145544245 has 96 divisors (see below), whose sum is σ = 4258904832. Its totient is φ = 989853696.

The previous prime is 2145544199. The next prime is 2145544301. The reversal of 2145544245 is 5424455412.

2145544245 is a `hidden beast` number, since 21 + 4 + 554 + 42 + 45 = 666.

It is not a de Polignac number, because 2145544245 - 2⁸ = 2145543989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4405392 + ... + 4405878.

It is an arithmetic number, because the mean of its divisors is an integer number (44363592).

Almost surely, 2^2145544245 is an apocalyptic number.

It is an amenable number.

2145544245 is a deficient number, since it is larger than the sum of its proper divisors (2113360587).

2145544245 is a wasteful number, since it uses less digits than its factorization.

2145544245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 968 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The square root of 2145544245 is about 46320.0199157988. The cubic root of 2145544245 is about 1289.7706550996.

Adding to 2145544245 its reverse (5424455412), we get a palindrome (7569999657).

The spelling of 2145544245 in words is "two billion, one hundred forty-five million, five hundred forty-four thousand, two hundred forty-five".