74542467171421 has 2 divisors, whose sum is σ = 74542467171422. Its totient is φ = 74542467171420.

The previous prime is 74542467171383. The next prime is 74542467171451. The reversal of 74542467171421 is 12417176424547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72138692902500 + 2403774268921 = 8493450^2 + 1550411^2 .

It is an emirp because it is prime and its reverse (12417176424547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74542467171421 - 2¹⁵ = 74542467138653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74542467171451) 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 as a sum of consecutive naturals, namely, 37271233585710 + 37271233585711.

It is an arithmetic number, because the mean of its divisors is an integer number (37271233585711).

Almost surely, 2^{74542467171421} is an apocalyptic number.

It is an amenable number.

74542467171421 is a deficient number, since it is larger than the sum of its proper divisors (1).

74542467171421 is an equidigital number, since it uses as much as digits as its factorization.

74542467171421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10536960, while the sum is 55.

The spelling of 74542467171421 in words is "seventy-four trillion, five hundred forty-two billion, four hundred sixty-seven million, one hundred seventy-one thousand, four hundred twenty-one".