2549216905243 has 4 divisors (see below), whose sum is σ = 2550495992488. Its totient is φ = 2547937818000.

The previous prime is 2549216905229. The next prime is 2549216905297. The reversal of 2549216905243 is 3425096129452.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2549216905243 - 2⁴¹ = 350193649691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549216905223) 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, 639540633 + ... + 639544618.

It is an arithmetic number, because the mean of its divisors is an integer number (637623998122).

Almost surely, 2^{2549216905243} is an apocalyptic number.

2549216905243 is a deficient number, since it is larger than the sum of its proper divisors (1279087245).

2549216905243 is a wasteful number, since it uses less digits than its factorization.

2549216905243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279087244.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 2549216905243 in words is "two trillion, five hundred forty-nine billion, two hundred sixteen million, nine hundred five thousand, two hundred forty-three".