19478386461 has 8 divisors (see below), whose sum is σ = 26101691200. Its totient is φ = 12920336352.

The previous prime is 19478386453. The next prime is 19478386489. The reversal of 19478386461 is 16468387491.

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

It is not a de Polignac number, because 19478386461 - 2³ = 19478386453 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 (19478386451) 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, 16312960 + ... + 16314153.

It is an arithmetic number, because the mean of its divisors is an integer number (3262711400).

Almost surely, 2^19478386461 is an apocalyptic number.

It is an amenable number.

19478386461 is a deficient number, since it is larger than the sum of its proper divisors (6623304739).

19478386461 is a wasteful number, since it uses less digits than its factorization.

19478386461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32627315.

The product of its digits is 6967296, while the sum is 57.

The spelling of 19478386461 in words is "nineteen billion, four hundred seventy-eight million, three hundred eighty-six thousand, four hundred sixty-one".