15540342040 has 16 divisors (see below), whose sum is σ = 34965769680. Its totient is φ = 6216136800.

The previous prime is 15540342031. The next prime is 15540342061. The reversal of 15540342040 is 4024304551.

15540342040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 194254236 + ... + 194254315.

It is an arithmetic number, because the mean of its divisors is an integer number (2185360605).

Almost surely, 2^15540342040 is an apocalyptic number.

15540342040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15540342040 is an abundant number, since it is smaller than the sum of its proper divisors (19425427640).

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

15540342040 is a wasteful number, since it uses less digits than its factorization.

15540342040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388508562 (or 388508558 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 15540342040 its reverse (4024304551), we get a palindrome (19564646591).

The spelling of 15540342040 in words is "fifteen billion, five hundred forty million, three hundred forty-two thousand, forty".