42391725813 has 16 divisors (see below), whose sum is σ = 62856235200. Its totient is φ = 28236995280.

The previous prime is 42391725809. The next prime is 42391725839. The reversal of 42391725813 is 31852719324.

It is a happy number.

42391725813 is a `hidden beast` number, since 4 + 2 + 391 + 7 + 258 + 1 + 3 = 666.

It is not a de Polignac number, because 42391725813 - 2² = 42391725809 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42391725413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 638778 + ... + 702011.

It is an arithmetic number, because the mean of its divisors is an integer number (3928514700).

Almost surely, 2^42391725813 is an apocalyptic number.

It is an amenable number.

42391725813 is a deficient number, since it is larger than the sum of its proper divisors (20464509387).

42391725813 is a wasteful number, since it uses less digits than its factorization.

42391725813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341969 (or 1341963 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 42391725813 in words is "forty-two billion, three hundred ninety-one million, seven hundred twenty-five thousand, eight hundred thirteen".