42154423444 has 18 divisors (see below), whose sum is σ = 85814362410. Its totient is φ = 18066181392.

The previous prime is 42154423411. The next prime is 42154423453. The reversal of 42154423444 is 44432445124.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40812080400 + 1342343044 = 202020^2 + 36638^2 .

It is a super-2 number, since 2×42154423444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107536599 + ... + 107536990.

Almost surely, 2^42154423444 is an apocalyptic number.

It is an amenable number.

42154423444 is an abundant number, since it is smaller than the sum of its proper divisors (43659938966).

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

42154423444 is a wasteful number, since it uses less digits than its factorization.

42154423444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215073607 (or 215073598 counting only the distinct ones).

The product of its digits is 245760, while the sum is 37.

Adding to 42154423444 its reverse (44432445124), we get a palindrome (86586868568).

The spelling of 42154423444 in words is "forty-two billion, one hundred fifty-four million, four hundred twenty-three thousand, four hundred forty-four".