15515040145 has 8 divisors (see below), whose sum is σ = 20310598080. Its totient is φ = 11283665520.

The previous prime is 15515040109. The next prime is 15515040173. The reversal of 15515040145 is 54104051551.

15515040145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15515040145 - 2¹⁵ = 15515007377 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 141045765 + ... + 141045874.

It is an arithmetic number, because the mean of its divisors is an integer number (2538824760).

Almost surely, 2^15515040145 is an apocalyptic number.

It is an amenable number.

15515040145 is a deficient number, since it is larger than the sum of its proper divisors (4795557935).

15515040145 is a wasteful number, since it uses less digits than its factorization.

15515040145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282091655.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 15515040145 its reverse (54104051551), we get a palindrome (69619091696).

The spelling of 15515040145 in words is "fifteen billion, five hundred fifteen million, forty thousand, one hundred forty-five".