42520414591 has 2 divisors, whose sum is σ = 42520414592. Its totient is φ = 42520414590.

The previous prime is 42520414579. The next prime is 42520414619. The reversal of 42520414591 is 19541402524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42520414591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42520414591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520414561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260207295 + 21260207296.

It is an arithmetic number, because the mean of its divisors is an integer number (21260207296).

Almost surely, 2^42520414591 is an apocalyptic number.

42520414591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520414591 is an equidigital number, since it uses as much as digits as its factorization.

42520414591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 42520414591 in words is "forty-two billion, five hundred twenty million, four hundred fourteen thousand, five hundred ninety-one".