2543642649123 has 32 divisors (see below), whose sum is σ = 3556904317440. Its totient is φ = 1614690443520.

The previous prime is 2543642649109. The next prime is 2543642649193. The reversal of 2543642649123 is 3219462463452.

It is not a de Polignac number, because 2543642649123 - 2⁶ = 2543642649059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2543642649193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95143668 + ... + 95170398.

It is an arithmetic number, because the mean of its divisors is an integer number (111153259920).

Almost surely, 2^{2543642649123} is an apocalyptic number.

2543642649123 is a deficient number, since it is larger than the sum of its proper divisors (1013261668317).

2543642649123 is a wasteful number, since it uses less digits than its factorization.

2543642649123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41819.

The product of its digits is 7464960, while the sum is 51.

The spelling of 2543642649123 in words is "two trillion, five hundred forty-three billion, six hundred forty-two million, six hundred forty-nine thousand, one hundred twenty-three".