42506340479 has 2 divisors, whose sum is σ = 42506340480. Its totient is φ = 42506340478.

The previous prime is 42506340379. The next prime is 42506340511. The reversal of 42506340479 is 97404360524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42506340479 - 2²⁰ = 42505291903 is a prime.

It is a super-3 number, since 3×42506340479³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42506340379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21253170239 + 21253170240.

It is an arithmetic number, because the mean of its divisors is an integer number (21253170240).

Almost surely, 2^42506340479 is an apocalyptic number.

42506340479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42506340479 is an equidigital number, since it uses as much as digits as its factorization.

42506340479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 42506340479 in words is "forty-two billion, five hundred six million, three hundred forty thousand, four hundred seventy-nine".