15530530493 has 4 divisors (see below), whose sum is σ = 15860967360. Its totient is φ = 15200093628.

The previous prime is 15530530471. The next prime is 15530530579. The reversal of 15530530493 is 39403503551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39403503551 = 6653 ⋅5922667.

It is a cyclic number.

It is not a de Polignac number, because 15530530493 - 2³⁰ = 14456788669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15530530453) 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, 165218363 + ... + 165218456.

It is an arithmetic number, because the mean of its divisors is an integer number (3965241840).

Almost surely, 2^15530530493 is an apocalyptic number.

It is an amenable number.

15530530493 is a deficient number, since it is larger than the sum of its proper divisors (330436867).

15530530493 is an equidigital number, since it uses as much as digits as its factorization.

15530530493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330436866.

The product of its (nonzero) digits is 121500, while the sum is 38.

The spelling of 15530530493 in words is "fifteen billion, five hundred thirty million, five hundred thirty thousand, four hundred ninety-three".