2505091645 has 16 divisors (see below), whose sum is σ = 3449940480. Its totient is φ = 1710584064.

The previous prime is 2505091643. The next prime is 2505091649. The reversal of 2505091645 is 5461905052.

It is not a de Polignac number, because 2505091645 - 2¹ = 2505091643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505091643) 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, 141372 + ... + 158101.

It is an arithmetic number, because the mean of its divisors is an integer number (215621280).

Almost surely, 2^2505091645 is an apocalyptic number.

It is an amenable number.

2505091645 is a deficient number, since it is larger than the sum of its proper divisors (944848835).

2505091645 is a wasteful number, since it uses less digits than its factorization.

2505091645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299724.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 2505091645 is about 50050.8905515177. The cubic root of 2505091645 is about 1358.1295735445.

Adding to 2505091645 its reverse (5461905052), we get a palindrome (7966996697).

The spelling of 2505091645 in words is "two billion, five hundred five million, ninety-one thousand, six hundred forty-five".