2541639894 has 8 divisors (see below), whose sum is σ = 5083279800. Its totient is φ = 847213296.

The previous prime is 2541639883. The next prime is 2541639901. The reversal of 2541639894 is 4989361452.

It is a sphenic number, since it is the product of 3 distinct primes.

2541639894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211803319 + ... + 211803330.

It is an arithmetic number, because the mean of its divisors is an integer number (635409975).

Almost surely, 2^2541639894 is an apocalyptic number.

2541639894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2541639894 is a wasteful number, since it uses less digits than its factorization.

2541639894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423606654.

The product of its digits is 1866240, while the sum is 51.

The square root of 2541639894 is about 50414.6793503638. The cubic root of 2541639894 is about 1364.7025599412.

The spelling of 2541639894 in words is "two billion, five hundred forty-one million, six hundred thirty-nine thousand, eight hundred ninety-four".