15540140045 has 16 divisors (see below), whose sum is σ = 20278775088. Its totient is φ = 11384570880.

The previous prime is 15540140041. The next prime is 15540140053. The reversal of 15540140045 is 54004104551.

15540140045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 4800134089 + 10740005956 = 69283^2 + 103634^2 .

It is not a de Polignac number, because 15540140045 - 2² = 15540140041 is a prime.

It is a super-4 number, since 4×15540140045⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540140041) 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, 2467466 + ... + 2473755.

It is an arithmetic number, because the mean of its divisors is an integer number (1267423443).

Almost surely, 2^15540140045 is an apocalyptic number.

It is an amenable number.

15540140045 is a deficient number, since it is larger than the sum of its proper divisors (4738635043).

15540140045 is a wasteful number, since it uses less digits than its factorization.

15540140045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941280.

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 15540140045 its reverse (54004104551), we get a palindrome (69544244596).

The spelling of 15540140045 in words is "fifteen billion, five hundred forty million, one hundred forty thousand, forty-five".