15540455441 has 4 divisors (see below), whose sum is σ = 17760520512. Its totient is φ = 13320390372.

The previous prime is 15540455419. The next prime is 15540455537. The reversal of 15540455441 is 14455404551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15540455441 - 2²² = 15536261137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15540455395 and 15540455404.

It is not an unprimeable number, because it can be changed into a prime (15540455141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110032525 + ... + 1110032538.

It is an arithmetic number, because the mean of its divisors is an integer number (4440130128).

Almost surely, 2^15540455441 is an apocalyptic number.

It is an amenable number.

15540455441 is a deficient number, since it is larger than the sum of its proper divisors (2220065071).

15540455441 is an equidigital number, since it uses as much as digits as its factorization.

15540455441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220065070.

The product of its (nonzero) digits is 160000, while the sum is 38.

Adding to 15540455441 its reverse (14455404551), we get a palindrome (29995859992).

The spelling of 15540455441 in words is "fifteen billion, five hundred forty million, four hundred fifty-five thousand, four hundred forty-one".