42439901945 has 64 divisors (see below), whose sum is σ = 60663582720. Its totient is φ = 27891302400.

The previous prime is 42439901941. The next prime is 42439901953. The reversal of 42439901945 is 54910993424.

It is not a de Polignac number, because 42439901945 - 2² = 42439901941 is a prime.

It is a super-2 number, since 2×42439901945² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42439901893 and 42439901902.

It is not an unprimeable number, because it can be changed into a prime (42439901941) 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 63 ways as a sum of consecutive naturals, for example, 81458285 + ... + 81458805.

It is an arithmetic number, because the mean of its divisors is an integer number (947868480).

Almost surely, 2^42439901945 is an apocalyptic number.

It is an amenable number.

42439901945 is a deficient number, since it is larger than the sum of its proper divisors (18223680775).

42439901945 is a wasteful number, since it uses less digits than its factorization.

42439901945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 42439901945 in words is "forty-two billion, four hundred thirty-nine million, nine hundred one thousand, nine hundred forty-five".