19248115561 has 4 divisors (see below), whose sum is σ = 19265256592. Its totient is φ = 19230974532.

The previous prime is 19248115519. The next prime is 19248115583. The reversal of 19248115561 is 16551184291.

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: 16551184291 = 3301 ⋅5013991.

It is a cyclic number.

It is not a de Polignac number, because 19248115561 - 2¹¹ = 19248113513 is a prime.

It is a super-2 number, since 2×19248115561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19248115591) 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, 8568831 + ... + 8571076.

It is an arithmetic number, because the mean of its divisors is an integer number (4816314148).

Almost surely, 2^19248115561 is an apocalyptic number.

It is an amenable number.

19248115561 is a deficient number, since it is larger than the sum of its proper divisors (17141031).

19248115561 is a wasteful number, since it uses less digits than its factorization.

19248115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17141030.

The product of its digits is 86400, while the sum is 43.

The spelling of 19248115561 in words is "nineteen billion, two hundred forty-eight million, one hundred fifteen thousand, five hundred sixty-one".