42129019633 has 2 divisors, whose sum is σ = 42129019634. Its totient is φ = 42129019632.

The previous prime is 42129019531. The next prime is 42129019651. The reversal of 42129019633 is 33691092124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27638397504 + 14490622129 = 166248^2 + 120377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42129019633 is a prime.

It is not a weakly prime, because it can be changed into another prime (42129029633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064509816 + 21064509817.

It is an arithmetic number, because the mean of its divisors is an integer number (21064509817).

Almost surely, 2^42129019633 is an apocalyptic number.

It is an amenable number.

42129019633 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129019633 is an equidigital number, since it uses as much as digits as its factorization.

42129019633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 42129019633 in words is "forty-two billion, one hundred twenty-nine million, nineteen thousand, six hundred thirty-three".