74367647135981 has 2 divisors, whose sum is σ = 74367647135982. Its totient is φ = 74367647135980.

The previous prime is 74367647135953. The next prime is 74367647136053. The reversal of 74367647135981 is 18953174676347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48130765517956 + 26236881618025 = 6937634^2 + 5122195^2 .

It is a cyclic number.

It is not a de Polignac number, because 74367647135981 - 2³⁴ = 74350467266797 is a prime.

It is a super-2 number, since 2×74367647135981² (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 (74367647132981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37183823567990 + 37183823567991.

It is an arithmetic number, because the mean of its divisors is an integer number (37183823567991).

Almost surely, 2^{74367647135981} is an apocalyptic number.

It is an amenable number.

74367647135981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74367647135981 is an equidigital number, since it uses as much as digits as its factorization.

74367647135981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640120320, while the sum is 71.

The spelling of 74367647135981 in words is "seventy-four trillion, three hundred sixty-seven billion, six hundred forty-seven million, one hundred thirty-five thousand, nine hundred eighty-one".