15530054440 has 16 divisors (see below), whose sum is σ = 34942622580. Its totient is φ = 6212021760.

The previous prime is 15530054429. The next prime is 15530054443. The reversal of 15530054440 is 4445003551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15426136804 + 103917636 = 124202^2 + 10194^2 .

It is not an unprimeable number, because it can be changed into a prime (15530054443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194125641 + ... + 194125720.

Almost surely, 2^15530054440 is an apocalyptic number.

15530054440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15530054440 is an abundant number, since it is smaller than the sum of its proper divisors (19412568140).

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

15530054440 is a wasteful number, since it uses less digits than its factorization.

15530054440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388251372 (or 388251368 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 15530054440 its reverse (4445003551), we get a palindrome (19975057991).

The spelling of 15530054440 in words is "fifteen billion, five hundred thirty million, fifty-four thousand, four hundred forty".