42505383797 has 4 divisors (see below), whose sum is σ = 44742509280. Its totient is φ = 40268258316.

The previous prime is 42505383779. The next prime is 42505383859. The reversal of 42505383797 is 79738350524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42505383797 - 2⁶ = 42505383733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505383727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118562713 + ... + 1118562750.

It is an arithmetic number, because the mean of its divisors is an integer number (11185627320).

Almost surely, 2^42505383797 is an apocalyptic number.

It is an amenable number.

42505383797 is a deficient number, since it is larger than the sum of its proper divisors (2237125483).

42505383797 is a wasteful number, since it uses less digits than its factorization.

42505383797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237125482.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 42505383797 in words is "forty-two billion, five hundred five million, three hundred eighty-three thousand, seven hundred ninety-seven".