74647084344421 has 2 divisors, whose sum is σ = 74647084344422. Its totient is φ = 74647084344420.

The previous prime is 74647084344347. The next prime is 74647084344451. The reversal of 74647084344421 is 12444348074647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48389914913796 + 26257169430625 = 6956286^2 + 5124175^2 .

It is a cyclic number.

It is not a de Polignac number, because 74647084344421 - 2¹¹ = 74647084342373 is a prime.

It is a super-2 number, since 2×74647084344421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74647084344451) 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, 37323542172210 + 37323542172211.

It is an arithmetic number, because the mean of its divisors is an integer number (37323542172211).

Almost surely, 2^{74647084344421} is an apocalyptic number.

It is an amenable number.

74647084344421 is a deficient number, since it is larger than the sum of its proper divisors (1).

74647084344421 is an equidigital number, since it uses as much as digits as its factorization.

74647084344421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57802752, while the sum is 58.

The spelling of 74647084344421 in words is "seventy-four trillion, six hundred forty-seven billion, eighty-four million, three hundred forty-four thousand, four hundred twenty-one".