19481548961 has 8 divisors (see below), whose sum is σ = 22277488704. Its totient is φ = 16688824560.

The previous prime is 19481548847. The next prime is 19481549027. The reversal of 19481548961 is 16984518491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19481548961 - 2³⁴ = 2301679777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19481548897 and 19481548906.

It is not an unprimeable number, because it can be changed into a prime (19481548061) 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 7 ways as a sum of consecutive naturals, for example, 790835 + ... + 815096.

It is an arithmetic number, because the mean of its divisors is an integer number (2784686088).

Almost surely, 2^19481548961 is an apocalyptic number.

It is an amenable number.

19481548961 is a deficient number, since it is larger than the sum of its proper divisors (2795939743).

19481548961 is a wasteful number, since it uses less digits than its factorization.

19481548961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607671.

The product of its digits is 2488320, while the sum is 56.

The spelling of 19481548961 in words is "nineteen billion, four hundred eighty-one million, five hundred forty-eight thousand, nine hundred sixty-one".