42591037597 has 2 divisors, whose sum is σ = 42591037598. Its totient is φ = 42591037596.

The previous prime is 42591037553. The next prime is 42591037603. The reversal of 42591037597 is 79573019524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28706186041 + 13884851556 = 169429^2 + 117834^2 .

It is a cyclic number.

It is not a de Polignac number, because 42591037597 - 2¹¹ = 42591035549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42591037297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21295518798 + 21295518799.

It is an arithmetic number, because the mean of its divisors is an integer number (21295518799).

Almost surely, 2^42591037597 is an apocalyptic number.

It is an amenable number.

42591037597 is a deficient number, since it is larger than the sum of its proper divisors (1).

42591037597 is an equidigital number, since it uses as much as digits as its factorization.

42591037597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 42591037597 in words is "forty-two billion, five hundred ninety-one million, thirty-seven thousand, five hundred ninety-seven".