15541145440 has 48 divisors (see below), whose sum is σ = 37180745280. Its totient is φ = 6137763840.

The previous prime is 15541145429. The next prime is 15541145479. The reversal of 15541145440 is 4454114551.

15541145440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15541145396 and 15541145405.

It is a congruent number.

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, 602121 + ... + 627400.

It is an arithmetic number, because the mean of its divisors is an integer number (774598860).

Almost surely, 2^15541145440 is an apocalyptic number.

15541145440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15541145440 is an abundant number, since it is smaller than the sum of its proper divisors (21639599840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15541145440 is a wasteful number, since it uses less digits than its factorization.

15541145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229615 (or 1229607 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 15541145440 its reverse (4454114551), we get a palindrome (19995259991).

The spelling of 15541145440 in words is "fifteen billion, five hundred forty-one million, one hundred forty-five thousand, four hundred forty".