42020440164 has 72 divisors (see below), whose sum is σ = 110583727800. Its totient is φ = 13441531392.

The previous prime is 42020440159. The next prime is 42020440181. The reversal of 42020440164 is 46104402024.

It is a happy number.

42020440164 is a `hidden beast` number, since 4 + 202 + 0 + 440 + 16 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7200880164 + 34819560000 = 84858^2 + 186600^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118839 + ... + 313310.

Almost surely, 2^42020440164 is an apocalyptic number.

It is an amenable number.

42020440164 is an abundant number, since it is smaller than the sum of its proper divisors (68563287636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42020440164 is a wasteful number, since it uses less digits than its factorization.

42020440164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432269 (or 432264 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 42020440164 its reverse (46104402024), we get a palindrome (88124842188).

The spelling of 42020440164 in words is "forty-two billion, twenty million, four hundred forty thousand, one hundred sixty-four".