42591334801 has 2 divisors, whose sum is σ = 42591334802. Its totient is φ = 42591334800.

The previous prime is 42591334757. The next prime is 42591334813. The reversal of 42591334801 is 10843319524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40996530576 + 1594804225 = 202476^2 + 39935^2 .

It is a cyclic number.

It is not a de Polignac number, because 42591334801 - 2²⁹ = 42054463889 is a prime.

It is not a weakly prime, because it can be changed into another prime (42591334831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21295667400 + 21295667401.

It is an arithmetic number, because the mean of its divisors is an integer number (21295667401).

Almost surely, 2^42591334801 is an apocalyptic number.

It is an amenable number.

42591334801 is a deficient number, since it is larger than the sum of its proper divisors (1).

42591334801 is an equidigital number, since it uses as much as digits as its factorization.

42591334801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 42591334801 in words is "forty-two billion, five hundred ninety-one million, three hundred thirty-four thousand, eight hundred one".