40144424212 has 6 divisors (see below), whose sum is σ = 70252742378. Its totient is φ = 20072212104.

The previous prime is 40144424197. The next prime is 40144424213. The reversal of 40144424212 is 21242444104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33067240336 + 7077183876 = 181844^2 + 84126^2 .

It is a super-2 number, since 2×40144424212² (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 (40144424213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5018053023 + ... + 5018053030.

Almost surely, 2^40144424212 is an apocalyptic number.

It is an amenable number.

40144424212 is a deficient number, since it is larger than the sum of its proper divisors (30108318166).

40144424212 is a wasteful number, since it uses less digits than its factorization.

40144424212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10036106057 (or 10036106055 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 40144424212 its reverse (21242444104), we get a palindrome (61386868316).

The spelling of 40144424212 in words is "forty billion, one hundred forty-four million, four hundred twenty-four thousand, two hundred twelve".