142817924407891 has 2 divisors, whose sum is σ = 142817924407892. Its totient is φ = 142817924407890.

The previous prime is 142817924407871. The next prime is 142817924407913. The reversal of 142817924407891 is 198704429718241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142817924407891 - 2³¹ = 142815776924243 is a prime.

It is not a weakly prime, because it can be changed into another prime (142817924407841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71408962203945 + 71408962203946.

It is an arithmetic number, because the mean of its divisors is an integer number (71408962203946).

Almost surely, 2^{142817924407891} is an apocalyptic number.

142817924407891 is a deficient number, since it is larger than the sum of its proper divisors (1).

142817924407891 is an equidigital number, since it uses as much as digits as its factorization.

142817924407891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65028096, while the sum is 67.

The spelling of 142817924407891 in words is "one hundred forty-two trillion, eight hundred seventeen billion, nine hundred twenty-four million, four hundred seven thousand, eight hundred ninety-one".