121762356416543 has 2 divisors, whose sum is σ = 121762356416544. Its totient is φ = 121762356416542.

The previous prime is 121762356416539. The next prime is 121762356416573. The reversal of 121762356416543 is 345614653267121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121762356416543 - 2² = 121762356416539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121762356416573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60881178208271 + 60881178208272.

It is an arithmetic number, because the mean of its divisors is an integer number (60881178208272).

Almost surely, 2^{121762356416543} is an apocalyptic number.

121762356416543 is a deficient number, since it is larger than the sum of its proper divisors (1).

121762356416543 is an equidigital number, since it uses as much as digits as its factorization.

121762356416543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 56.

The spelling of 121762356416543 in words is "one hundred twenty-one trillion, seven hundred sixty-two billion, three hundred fifty-six million, four hundred sixteen thousand, five hundred forty-three".