2545720403 has 16 divisors (see below), whose sum is σ = 2787874560. Its totient is φ = 2314137600.

The previous prime is 2545720379. The next prime is 2545720417. The reversal of 2545720403 is 3040275452.

It is not a de Polignac number, because 2545720403 - 2⁸ = 2545720147 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 2545720403.

It is not an unprimeable number, because it can be changed into a prime (2545720423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280643 + ... + 289571.

It is an arithmetic number, because the mean of its divisors is an integer number (174242160).

Almost surely, 2^2545720403 is an apocalyptic number.

2545720403 is a deficient number, since it is larger than the sum of its proper divisors (242154157).

2545720403 is a wasteful number, since it uses less digits than its factorization.

2545720403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 2545720403 is about 50455.1325734062. The cubic root of 2545720403 is about 1365.4324959748.

Adding to 2545720403 its reverse (3040275452), we get a palindrome (5585995855).

The spelling of 2545720403 in words is "two billion, five hundred forty-five million, seven hundred twenty thousand, four hundred three".