102543242251049 has 4 divisors (see below), whose sum is σ = 102543266964864. Its totient is φ = 102543217537236.

The previous prime is 102543242251003. The next prime is 102543242251057. The reversal of 102543242251049 is 940152242345201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102543242251049 - 2¹² = 102543242246953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102543242254049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4444037 + ... + 14994530.

It is an arithmetic number, because the mean of its divisors is an integer number (25635816741216).

Almost surely, 2^{102543242251049} is an apocalyptic number.

It is an amenable number.

102543242251049 is a deficient number, since it is larger than the sum of its proper divisors (24713815).

102543242251049 is an equidigital number, since it uses as much as digits as its factorization.

102543242251049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24713814.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 102543242251049 in words is "one hundred two trillion, five hundred forty-three billion, two hundred forty-two million, two hundred fifty-one thousand, forty-nine".