40042405440 has 84 divisors (see below), whose sum is σ = 137729200284. Its totient is φ = 10677974016.

The previous prime is 40042405423. The next prime is 40042405453. The reversal of 40042405440 is 4450424004.

It is a happy number.

40042405440 is a `hidden beast` number, since 40 + 0 + 42 + 40 + 544 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29471275584 + 10571129856 = 171672^2 + 102816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6948927 + ... + 6954686.

Almost surely, 2^40042405440 is an apocalyptic number.

40042405440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40042405440 is an abundant number, since it is smaller than the sum of its proper divisors (97686794844).

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

40042405440 is a wasteful number, since it uses less digits than its factorization.

40042405440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13903636 (or 13903623 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 40042405440 its reverse (4450424004), we get a palindrome (44492829444).

The spelling of 40042405440 in words is "forty billion, forty-two million, four hundred five thousand, four hundred forty".