74619646121 has 2 divisors, whose sum is σ = 74619646122. Its totient is φ = 74619646120.

The previous prime is 74619646117. The next prime is 74619646207. The reversal of 74619646121 is 12164691647.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74535006121 + 84640000 = 273011^2 + 9200^2 .

It is a cyclic number.

It is not a de Polignac number, because 74619646121 - 2² = 74619646117 is a prime.

It is not a weakly prime, because it can be changed into another prime (74619643121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37309823060 + 37309823061.

It is an arithmetic number, because the mean of its divisors is an integer number (37309823061).

Almost surely, 2^74619646121 is an apocalyptic number.

It is an amenable number.

74619646121 is a deficient number, since it is larger than the sum of its proper divisors (1).

74619646121 is an equidigital number, since it uses as much as digits as its factorization.

74619646121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 74619646121 in words is "seventy-four billion, six hundred nineteen million, six hundred forty-six thousand, one hundred twenty-one".