15550450040 has 64 divisors (see below), whose sum is σ = 35240844960. Its totient is φ = 6175457280.

The previous prime is 15550450009. The next prime is 15550450043. The reversal of 15550450040 is 4005405551.

It is a happy number.

15550450040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15550449985 and 15550450012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550450043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4452695 + ... + 4456185.

Almost surely, 2^15550450040 is an apocalyptic number.

15550450040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15550450040 is an abundant number, since it is smaller than the sum of its proper divisors (19690394920).

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

15550450040 is a wasteful number, since it uses less digits than its factorization.

15550450040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

Adding to 15550450040 its reverse (4005405551), we get a palindrome (19555855591).

The spelling of 15550450040 in words is "fifteen billion, five hundred fifty million, four hundred fifty thousand, forty".