15711240145 has 8 divisors (see below), whose sum is σ = 18991105704. Its totient is φ = 12477247104.

The previous prime is 15711240143. The next prime is 15711240173. The reversal of 15711240145 is 54104211751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1441265296 + 14269974849 = 37964^2 + 119457^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15711240145 - 2¹ = 15711240143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15711240143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11467374 + ... + 11468743.

It is an arithmetic number, because the mean of its divisors is an integer number (2373888213).

Almost surely, 2^15711240145 is an apocalyptic number.

It is an amenable number.

15711240145 is a deficient number, since it is larger than the sum of its proper divisors (3279865559).

15711240145 is a wasteful number, since it uses less digits than its factorization.

15711240145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22936259.

The product of its (nonzero) digits is 5600, while the sum is 31.

Adding to 15711240145 its reverse (54104211751), we get a palindrome (69815451896).

The spelling of 15711240145 in words is "fifteen billion, seven hundred eleven million, two hundred forty thousand, one hundred forty-five".