42493065831 has 20 divisors (see below), whose sum is σ = 66818208600. Its totient is φ = 26837724816.

The previous prime is 42493065817. The next prime is 42493065859. The reversal of 42493065831 is 13856039424.

42493065831 is a `hidden beast` number, since 424 + 93 + 0 + 65 + 83 + 1 = 666.

It is not a de Polignac number, because 42493065831 - 2¹³ = 42493057639 is a prime.

It is a super-2 number, since 2×42493065831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42493065871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13803876 + ... + 13806953.

It is an arithmetic number, because the mean of its divisors is an integer number (3340910430).

Almost surely, 2^42493065831 is an apocalyptic number.

42493065831 is a deficient number, since it is larger than the sum of its proper divisors (24325142769).

42493065831 is a wasteful number, since it uses less digits than its factorization.

42493065831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27610860 (or 27610851 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 42493065831 in words is "forty-two billion, four hundred ninety-three million, sixty-five thousand, eight hundred thirty-one".