2545944987 has 4 divisors (see below), whose sum is σ = 3394593320. Its totient is φ = 1697296656.

The previous prime is 2545944977. The next prime is 2545945009. The reversal of 2545944987 is 7894495452.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2545944987 - 2¹⁵ = 2545912219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545944977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424324162 + ... + 424324167.

It is an arithmetic number, because the mean of its divisors is an integer number (848648330).

Almost surely, 2^2545944987 is an apocalyptic number.

2545944987 is a deficient number, since it is larger than the sum of its proper divisors (848648333).

2545944987 is an equidigital number, since it uses as much as digits as its factorization.

2545944987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848648332.

The product of its digits is 14515200, while the sum is 57.

The square root of 2545944987 is about 50457.3581056321. The cubic root of 2545944987 is about 1365.4726477100.

The spelling of 2545944987 in words is "two billion, five hundred forty-five million, nine hundred forty-four thousand, nine hundred eighty-seven".