2545784871 has 16 divisors (see below), whose sum is σ = 3882412800. Its totient is φ = 1453563648.

The previous prime is 2545784851. The next prime is 2545784873. The reversal of 2545784871 is 1784875452.

It is a happy number.

It is not a de Polignac number, because 2545784871 - 2¹¹ = 2545782823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545784873) 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, 21706 + ... + 74583.

It is an arithmetic number, because the mean of its divisors is an integer number (242650800).

Almost surely, 2^2545784871 is an apocalyptic number.

2545784871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2545784871 is a deficient number, since it is larger than the sum of its proper divisors (1336627929).

2545784871 is a wasteful number, since it uses less digits than its factorization.

2545784871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97558.

The product of its digits is 2508800, while the sum is 51.

The square root of 2545784871 is about 50455.7714339995. The cubic root of 2545784871 is about 1365.4440219799. Note that the first 3 decimals are identical.

The spelling of 2545784871 in words is "two billion, five hundred forty-five million, seven hundred eighty-four thousand, eight hundred seventy-one".