15540041121 has 16 divisors (see below), whose sum is σ = 22619009280. Its totient is φ = 9411826320.

The previous prime is 15540041089. The next prime is 15540041129. The reversal of 15540041121 is 12114004551.

It is not a de Polignac number, because 15540041121 - 2⁵ = 15540041089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15540041091 and 15540041100.

It is not an unprimeable number, because it can be changed into a prime (15540041129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109831 + ... + 207708.

It is an arithmetic number, because the mean of its divisors is an integer number (1413688080).

Almost surely, 2^15540041121 is an apocalyptic number.

15540041121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15540041121 is a deficient number, since it is larger than the sum of its proper divisors (7078968159).

15540041121 is a wasteful number, since it uses less digits than its factorization.

15540041121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319036.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 15540041121 its reverse (12114004551), we get a palindrome (27654045672).

The spelling of 15540041121 in words is "fifteen billion, five hundred forty million, forty-one thousand, one hundred twenty-one".