2545638956543 has 8 divisors (see below), whose sum is σ = 2549491320528. Its totient is φ = 2541786960064.

The previous prime is 2545638956521. The next prime is 2545638956573. The reversal of 2545638956543 is 3456598365452.

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

It is a cyclic number.

It is not a de Polignac number, because 2545638956543 - 2⁶ = 2545638956479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2545638956543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545638956573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15856571 + ... + 16016307.

It is an arithmetic number, because the mean of its divisors is an integer number (318686415066).

Almost surely, 2^{2545638956543} is an apocalyptic number.

2545638956543 is a deficient number, since it is larger than the sum of its proper divisors (3852363985).

2545638956543 is a wasteful number, since it uses less digits than its factorization.

2545638956543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183753.

The product of its digits is 466560000, while the sum is 65.

The spelling of 2545638956543 in words is "two trillion, five hundred forty-five billion, six hundred thirty-eight million, nine hundred fifty-six thousand, five hundred forty-three".